diff --git a/tl/generate/scheme/ton_api.tl b/tl/generate/scheme/ton_api.tl
index f04f7863..3a2ad1fc 100644
--- a/tl/generate/scheme/ton_api.tl
+++ b/tl/generate/scheme/ton_api.tl
@@ -715,6 +715,8 @@ engine.validator.getValidatorSessionsInfo = engine.validator.ValidatorSessionsIn
 
 engine.validator.addCollator adnl_id:int256 shard:tonNode.shardId = engine.validator.Success;
 engine.validator.addShard shard:tonNode.shardId = engine.validator.Success;
+engine.validator.delCollator adnl_id:int256 shard:tonNode.shardId = engine.validator.Success;
+engine.validator.delShard shard:tonNode.shardId = engine.validator.Success;
 
 ---types---
 
diff --git a/tl/generate/scheme/ton_api.tlo b/tl/generate/scheme/ton_api.tlo
index d535668a..2820a789 100644
Binary files a/tl/generate/scheme/ton_api.tlo and b/tl/generate/scheme/ton_api.tlo differ
diff --git a/validator-engine-console/validator-engine-console-query.cpp b/validator-engine-console/validator-engine-console-query.cpp
index cab34777..7bad3c97 100644
--- a/validator-engine-console/validator-engine-console-query.cpp
+++ b/validator-engine-console/validator-engine-console-query.cpp
@@ -1119,3 +1119,44 @@ td::Status AddShardQuery::receive(td::BufferSlice data) {
   td::TerminalIO::out() << "successfully added shard\n";
   return td::Status::OK();
 }
+
+td::Status DelCollatorQuery::run() {
+  TRY_RESULT_ASSIGN(adnl_id_, tokenizer_.get_token<ton::PublicKeyHash>());
+  TRY_RESULT_ASSIGN(wc_, tokenizer_.get_token<td::int32>());
+  TRY_RESULT_ASSIGN(shard_, tokenizer_.get_token<td::int64>());
+  return td::Status::OK();
+}
+
+td::Status DelCollatorQuery::send() {
+  auto b = ton::create_serialize_tl_object<ton::ton_api::engine_validator_delCollator>(
+      adnl_id_.tl(), ton::create_tl_shard_id(ton::ShardIdFull(wc_, shard_)));
+  td::actor::send_closure(console_, &ValidatorEngineConsole::envelope_send_query, std::move(b), create_promise());
+  return td::Status::OK();
+}
+
+td::Status DelCollatorQuery::receive(td::BufferSlice data) {
+  TRY_RESULT_PREFIX(f, ton::fetch_tl_object<ton::ton_api::engine_validator_success>(data.as_slice(), true),
+                    "received incorrect answer: ");
+  td::TerminalIO::out() << "successfully removed  collator\n";
+  return td::Status::OK();
+}
+
+td::Status DelShardQuery::run() {
+  TRY_RESULT_ASSIGN(wc_, tokenizer_.get_token<td::int32>());
+  TRY_RESULT_ASSIGN(shard_, tokenizer_.get_token<td::int64>());
+  return td::Status::OK();
+}
+
+td::Status DelShardQuery::send() {
+  auto b = ton::create_serialize_tl_object<ton::ton_api::engine_validator_delShard>(
+      ton::create_tl_shard_id(ton::ShardIdFull(wc_, shard_)));
+  td::actor::send_closure(console_, &ValidatorEngineConsole::envelope_send_query, std::move(b), create_promise());
+  return td::Status::OK();
+}
+
+td::Status DelShardQuery::receive(td::BufferSlice data) {
+  TRY_RESULT_PREFIX(f, ton::fetch_tl_object<ton::ton_api::engine_validator_success>(data.as_slice(), true),
+                    "received incorrect answer: ");
+  td::TerminalIO::out() << "successfully removed shard\n";
+  return td::Status::OK();
+}
diff --git a/validator-engine-console/validator-engine-console-query.h b/validator-engine-console/validator-engine-console-query.h
index 316cc5e7..3c2c2193 100644
--- a/validator-engine-console/validator-engine-console-query.h
+++ b/validator-engine-console/validator-engine-console-query.h
@@ -1162,3 +1162,50 @@ class AddShardQuery : public Query {
   td::int32 wc_;
   td::int64 shard_;
 };
+
+class DelCollatorQuery : public Query {
+ public:
+  DelCollatorQuery(td::actor::ActorId<ValidatorEngineConsole> console, Tokenizer tokenizer)
+      : Query(console, std::move(tokenizer)) {
+  }
+  td::Status run() override;
+  td::Status send() override;
+  td::Status receive(td::BufferSlice data) override;
+  static std::string get_name() {
+    return "delcollator";
+  }
+  static std::string get_help() {
+    return "delcollator <adnl_id> <workchain> <shard>\tremove collator with given adnl_id and shard";
+  }
+  std::string name() const override {
+    return get_name();
+  }
+
+ private:
+  ton::PublicKeyHash adnl_id_;
+  td::int32 wc_;
+  td::int64 shard_;
+};
+
+class DelShardQuery : public Query {
+ public:
+  DelShardQuery(td::actor::ActorId<ValidatorEngineConsole> console, Tokenizer tokenizer)
+      : Query(console, std::move(tokenizer)) {
+  }
+  td::Status run() override;
+  td::Status send() override;
+  td::Status receive(td::BufferSlice data) override;
+  static std::string get_name() {
+    return "delshard";
+  }
+  static std::string get_help() {
+    return "delshard <workchain> <shard>\tstop monitoring shard";
+  }
+  std::string name() const override {
+    return get_name();
+  }
+
+ private:
+  td::int32 wc_;
+  td::int64 shard_;
+};
diff --git a/validator-engine/validator-engine.cpp b/validator-engine/validator-engine.cpp
index 14a6961f..cd14ae1e 100644
--- a/validator-engine/validator-engine.cpp
+++ b/validator-engine/validator-engine.cpp
@@ -418,6 +418,19 @@ td::Result<bool> Config::config_add_collator(ton::PublicKeyHash addr, ton::Shard
   return true;
 }
 
+td::Result<bool> Config::config_del_collator(ton::PublicKeyHash addr, ton::ShardIdFull shard) {
+  if (!shard.is_valid_ext()) {
+    return td::Status::Error(PSTRING() << "invalid shard: " << shard.to_str());
+  }
+  Collator c{addr, shard};
+  auto it = std::find(collators.begin(), collators.end(), c);
+  if (it == collators.end()) {
+    return false;
+  }
+  collators.erase(it);
+  return true;
+}
+
 td::Result<bool> Config::config_add_full_node_adnl_id(ton::PublicKeyHash id) {
   if (full_node == id) {
     return false;
@@ -548,6 +561,18 @@ td::Result<bool> Config::config_add_shard(ton::ShardIdFull shard) {
   return true;
 }
 
+td::Result<bool> Config::config_del_shard(ton::ShardIdFull shard) {
+  if (!shard.is_valid_ext()) {
+    return td::Status::Error(PSTRING() << "invalid shard " << shard.to_str());
+  }
+  auto it = std::find(shards_to_monitor.begin(), shards_to_monitor.end(), shard);
+  if (it == shards_to_monitor.end()) {
+    return false;
+  }
+  shards_to_monitor.erase(it);
+  return true;
+}
+
 td::Result<bool> Config::config_add_gc(ton::PublicKeyHash key) {
   return gc.insert(key).second;
 }
@@ -3506,6 +3531,85 @@ void ValidatorEngine::run_control_query(ton::ton_api::engine_validator_addShard
   });
 }
 
+void ValidatorEngine::run_control_query(ton::ton_api::engine_validator_delCollator &query,
+                                        td::BufferSlice data, ton::PublicKeyHash src, td::uint32 perm,
+                                        td::Promise<td::BufferSlice> promise) {
+  if (!(perm & ValidatorEnginePermissions::vep_modify)) {
+    promise.set_value(create_control_query_error(td::Status::Error(ton::ErrorCode::error, "not authorized")));
+    return;
+  }
+  if (!started_) {
+    promise.set_value(create_control_query_error(td::Status::Error(ton::ErrorCode::notready, "not started")));
+    return;
+  }
+
+  auto id = ton::PublicKeyHash{query.adnl_id_};
+  auto shard = ton::create_shard_id(query.shard_);
+  auto R = config_.config_del_collator(id, shard);
+  if (R.is_error()) {
+    promise.set_value(create_control_query_error(R.move_as_error()));
+    return;
+  }
+  if (!R.move_as_ok()) {
+    promise.set_value(create_control_query_error(td::Status::Error("No such collator")));
+    return;
+  }
+  if (!R.move_as_ok()) {
+    promise.set_value(ton::serialize_tl_object(ton::create_tl_object<ton::ton_api::engine_validator_success>(), true));
+    return;
+  }
+  set_shard_check_function();
+  if (!validator_manager_.empty()) {
+    td::actor::send_closure(validator_manager_, &ton::validator::ValidatorManagerInterface::update_options,
+                            validator_options_);
+    td::actor::send_closure(validator_manager_, &ton::validator::ValidatorManagerInterface::del_collator,
+                            ton::adnl::AdnlNodeIdShort(id), shard);
+  }
+  write_config([promise = std::move(promise)](td::Result<td::Unit> R) mutable {
+    if (R.is_error()) {
+      promise.set_value(create_control_query_error(R.move_as_error()));
+    } else {
+      promise.set_value(ton::serialize_tl_object(ton::create_tl_object<ton::ton_api::engine_validator_success>(), true));
+    }
+  });
+}
+
+void ValidatorEngine::run_control_query(ton::ton_api::engine_validator_delShard &query,
+                                        td::BufferSlice data, ton::PublicKeyHash src, td::uint32 perm,
+                                        td::Promise<td::BufferSlice> promise) {
+  if (!(perm & ValidatorEnginePermissions::vep_modify)) {
+    promise.set_value(create_control_query_error(td::Status::Error(ton::ErrorCode::error, "not authorized")));
+    return;
+  }
+  if (!started_) {
+    promise.set_value(create_control_query_error(td::Status::Error(ton::ErrorCode::notready, "not started")));
+    return;
+  }
+
+  auto shard = ton::create_shard_id(query.shard_);
+  auto R = config_.config_del_shard(shard);
+  if (R.is_error()) {
+    promise.set_value(create_control_query_error(R.move_as_error()));
+    return;
+  }
+  if (!R.move_as_ok()) {
+    promise.set_value(create_control_query_error(td::Status::Error("No such shard")));
+    return;
+  }
+  set_shard_check_function();
+  if (!validator_manager_.empty()) {
+    td::actor::send_closure(validator_manager_, &ton::validator::ValidatorManagerInterface::update_options,
+                            validator_options_);
+  }
+  write_config([promise = std::move(promise)](td::Result<td::Unit> R) mutable {
+    if (R.is_error()) {
+      promise.set_value(create_control_query_error(R.move_as_error()));
+    } else {
+      promise.set_value(ton::serialize_tl_object(ton::create_tl_object<ton::ton_api::engine_validator_success>(), true));
+    }
+  });
+}
+
 void ValidatorEngine::process_control_query(td::uint16 port, ton::adnl::AdnlNodeIdShort src,
                                             ton::adnl::AdnlNodeIdShort dst, td::BufferSlice data,
                                             td::Promise<td::BufferSlice> promise) {
diff --git a/validator-engine/validator-engine.hpp b/validator-engine/validator-engine.hpp
index 71276e5d..49010bc4 100644
--- a/validator-engine/validator-engine.hpp
+++ b/validator-engine/validator-engine.hpp
@@ -115,6 +115,7 @@ struct Config {
   td::Result<bool> config_add_validator_adnl_id(ton::PublicKeyHash perm_key, ton::PublicKeyHash adnl_id,
                                                 ton::UnixTime expire_at);
   td::Result<bool> config_add_collator(ton::PublicKeyHash addr, ton::ShardIdFull shard);
+  td::Result<bool> config_del_collator(ton::PublicKeyHash addr, ton::ShardIdFull shard);
   td::Result<bool> config_add_full_node_adnl_id(ton::PublicKeyHash id);
   td::Result<bool> config_add_full_node_slave(td::IPAddress addr, ton::PublicKey id);
   td::Result<bool> config_add_full_node_master(td::int32 port, ton::PublicKeyHash id);
@@ -123,6 +124,7 @@ struct Config {
   td::Result<bool> config_add_control_process(ton::PublicKeyHash key, td::int32 port, ton::PublicKeyHash id,
                                               td::uint32 permissions);
   td::Result<bool> config_add_shard(ton::ShardIdFull shard);
+  td::Result<bool> config_del_shard(ton::ShardIdFull shard);
   td::Result<bool> config_add_gc(ton::PublicKeyHash key);
   td::Result<bool> config_del_network_addr(td::IPAddress addr, std::vector<AdnlCategory> cats,
                                            std::vector<AdnlCategory> prio_cats);
@@ -437,6 +439,10 @@ class ValidatorEngine : public td::actor::Actor {
                          ton::PublicKeyHash src, td::uint32 perm, td::Promise<td::BufferSlice> promise);
   void run_control_query(ton::ton_api::engine_validator_addShard &query, td::BufferSlice data,
                          ton::PublicKeyHash src, td::uint32 perm, td::Promise<td::BufferSlice> promise);
+  void run_control_query(ton::ton_api::engine_validator_delCollator &query, td::BufferSlice data,
+                         ton::PublicKeyHash src, td::uint32 perm, td::Promise<td::BufferSlice> promise);
+  void run_control_query(ton::ton_api::engine_validator_delShard &query, td::BufferSlice data,
+                         ton::PublicKeyHash src, td::uint32 perm, td::Promise<td::BufferSlice> promise);
   void run_control_query(ton::ton_api::engine_validator_getPerfTimerStats &query, td::BufferSlice data,
                          ton::PublicKeyHash src, td::uint32 perm, td::Promise<td::BufferSlice> promise);
   template <class T>
diff --git a/validator/collator-node.cpp b/validator/collator-node.cpp
index 0a2a050e..c6afa541 100644
--- a/validator/collator-node.cpp
+++ b/validator/collator-node.cpp
@@ -54,10 +54,20 @@ void CollatorNode::tear_down() {
 }
 
 void CollatorNode::add_shard(ShardIdFull shard) {
+  if (std::find(shards_.begin(), shards_.end(), shard) != shards_.end()) {
+    return;
+  }
   LOG(INFO) << "Collator node: local_id=" << local_id_ << " , shard=" << shard.to_str();
   shards_.push_back(shard);
 }
 
+void CollatorNode::del_shard(ShardIdFull shard) {
+  auto it = std::find(shards_.begin(), shards_.end(), shard);
+  if (it != shards_.end()) {
+    shards_.erase(it);
+  }
+}
+
 void CollatorNode::new_masterchain_block_notification(td::Ref<MasterchainState> state) {
   std::vector<BlockIdExt> top_blocks = {state->get_block_id()};
   std::vector<ShardIdFull> next_shards;
diff --git a/validator/collator-node.hpp b/validator/collator-node.hpp
index b0a2ad90..b3b232cf 100644
--- a/validator/collator-node.hpp
+++ b/validator/collator-node.hpp
@@ -32,6 +32,7 @@ class CollatorNode : public td::actor::Actor {
   void start_up() override;
   void tear_down() override;
   void add_shard(ShardIdFull shard);
+  void del_shard(ShardIdFull shard);
 
   void new_masterchain_block_notification(td::Ref<MasterchainState> state);
 
diff --git a/validator/manager-disk.hpp b/validator/manager-disk.hpp
index c4403e94..e0aad62e 100644
--- a/validator/manager-disk.hpp
+++ b/validator/manager-disk.hpp
@@ -395,6 +395,9 @@ class ValidatorManagerImpl : public ValidatorManager {
   void add_collator(adnl::AdnlNodeIdShort id, ShardIdFull shard) override {
     UNREACHABLE();
   }
+  void del_collator(adnl::AdnlNodeIdShort id, ShardIdFull shard) override {
+    UNREACHABLE();
+  }
 
   void update_options(td::Ref<ValidatorManagerOptions> opts) override {
     opts_ = std::move(opts);
diff --git a/validator/manager-hardfork.hpp b/validator/manager-hardfork.hpp
index bd30b1de..e8fa327b 100644
--- a/validator/manager-hardfork.hpp
+++ b/validator/manager-hardfork.hpp
@@ -454,6 +454,9 @@ class ValidatorManagerImpl : public ValidatorManager {
   void add_collator(adnl::AdnlNodeIdShort id, ShardIdFull shard) override {
     UNREACHABLE();
   }
+  void del_collator(adnl::AdnlNodeIdShort id, ShardIdFull shard) override {
+    UNREACHABLE();
+  }
   void update_options(td::Ref<ValidatorManagerOptions> opts) override {
     opts_ = std::move(opts);
   }
diff --git a/validator/manager.cpp b/validator/manager.cpp
index 183dc8c1..f56d6901 100644
--- a/validator/manager.cpp
+++ b/validator/manager.cpp
@@ -1795,7 +1795,7 @@ void ValidatorManagerImpl::new_masterchain_block() {
                             last_masterchain_block_handle_, last_masterchain_state_);
   }
   for (auto &c : collator_nodes_) {
-    td::actor::send_closure(c.second, &CollatorNode::new_masterchain_block_notification, last_masterchain_state_);
+    td::actor::send_closure(c.second.actor, &CollatorNode::new_masterchain_block_notification, last_masterchain_state_);
   }
 
   if (last_masterchain_seqno_ % 1024 == 0) {
@@ -2722,10 +2722,23 @@ void ValidatorManagerImpl::get_validator_sessions_info(
 void ValidatorManagerImpl::add_collator(adnl::AdnlNodeIdShort id, ShardIdFull shard) {
   auto it = collator_nodes_.find(id);
   if (it == collator_nodes_.end()) {
-    auto actor = td::actor::create_actor<CollatorNode>("collatornode", id, actor_id(this), adnl_, rldp_);
-    it = collator_nodes_.emplace(id, std::move(actor)).first;
+    it = collator_nodes_.emplace(id, Collator()).first;
+    it->second.actor = td::actor::create_actor<CollatorNode>("collatornode", id, actor_id(this), adnl_, rldp_);
+  }
+  it->second.shards.insert(shard);
+  td::actor::send_closure(it->second.actor, &CollatorNode::add_shard, shard);
+}
+
+void ValidatorManagerImpl::del_collator(adnl::AdnlNodeIdShort id, ShardIdFull shard) {
+  auto it = collator_nodes_.find(id);
+  if (it == collator_nodes_.end()) {
+    return;
+  }
+  td::actor::send_closure(it->second.actor, &CollatorNode::del_shard, shard);
+  it->second.shards.erase(shard);
+  if (it->second.shards.empty()) {
+    collator_nodes_.erase(it);
   }
-  td::actor::send_closure(it->second, &CollatorNode::add_shard, shard);
 }
 
 void ValidatorManagerImpl::update_options(td::Ref<ValidatorManagerOptions> opts) {
diff --git a/validator/manager.hpp b/validator/manager.hpp
index 136e5e8a..6fca1178 100644
--- a/validator/manager.hpp
+++ b/validator/manager.hpp
@@ -563,6 +563,7 @@ class ValidatorManagerImpl : public ValidatorManager {
   void add_persistent_state_description(td::Ref<PersistentStateDescription> desc) override;
 
   void add_collator(adnl::AdnlNodeIdShort id, ShardIdFull shard) override;
+  void del_collator(adnl::AdnlNodeIdShort id, ShardIdFull shard) override;
   void update_options(td::Ref<ValidatorManagerOptions> opts) override;
 
  private:
@@ -639,7 +640,11 @@ class ValidatorManagerImpl : public ValidatorManager {
 
   std::map<BlockSeqno, WaitList<td::actor::Actor, td::Unit>> shard_client_waiters_;
 
-  std::map<adnl::AdnlNodeIdShort, td::actor::ActorOwn<CollatorNode>> collator_nodes_;
+  struct Collator {
+    td::actor::ActorOwn<CollatorNode> actor;
+    std::set<ShardIdFull> shards;
+  };
+  std::map<adnl::AdnlNodeIdShort, Collator> collator_nodes_;
 
   std::set<ShardIdFull> extra_active_shards_;
   std::map<ShardIdFull, BlockSeqno> last_validated_blocks_;
diff --git a/validator/validator.h b/validator/validator.h
index c387caff..0a5a22b5 100644
--- a/validator/validator.h
+++ b/validator/validator.h
@@ -238,6 +238,7 @@ class ValidatorManagerInterface : public td::actor::Actor {
       td::Promise<tl_object_ptr<ton_api::engine_validator_validatorSessionsInfo>> promise) = 0;
 
   virtual void add_collator(adnl::AdnlNodeIdShort id, ShardIdFull shard) = 0;
+  virtual void del_collator(adnl::AdnlNodeIdShort id, ShardIdFull shard) = 0;
   virtual void update_options(td::Ref<ValidatorManagerOptions> opts) = 0;
 };