diff --git a/deps/rabbitmq_cli/lib/rabbitmq/cli/core/merges_default_virtual_host.ex b/deps/rabbitmq_cli/lib/rabbitmq/cli/core/merges_default_virtual_host.ex
new file mode 100644
index 0000000000..94b1b768b6
--- /dev/null
+++ b/deps/rabbitmq_cli/lib/rabbitmq/cli/core/merges_default_virtual_host.ex
@@ -0,0 +1,15 @@
+## This Source Code Form is subject to the terms of the Mozilla Public
+## License, v. 2.0. If a copy of the MPL was not distributed with this
+## file, You can obtain one at https://mozilla.org/MPL/2.0/.
+##
+## Copyright (c) 2007-2020 VMware, Inc. or its affiliates.  All rights reserved.
+
+# Should be used by commands that require rabbit app to be stopped
+# but need no other execution environment validators.
+defmodule RabbitMQ.CLI.Core.MergesDefaultVirtualHost do
+  defmacro __using__(_) do
+    quote do
+      def merge_defaults(args, opts), do: {args, Map.merge(%{vhost: "/"}, opts)}
+    end
+  end
+end
diff --git a/deps/rabbitmq_cli/lib/rabbitmq/cli/queues/commands/reclaim_quorum_memory_command.ex b/deps/rabbitmq_cli/lib/rabbitmq/cli/queues/commands/reclaim_quorum_memory_command.ex
new file mode 100644
index 0000000000..3452cc8741
--- /dev/null
+++ b/deps/rabbitmq_cli/lib/rabbitmq/cli/queues/commands/reclaim_quorum_memory_command.ex
@@ -0,0 +1,69 @@
+## This Source Code Form is subject to the terms of the Mozilla Public
+## License, v. 2.0. If a copy of the MPL was not distributed with this
+## file, You can obtain one at https://mozilla.org/MPL/2.0/.
+##
+## Copyright (c) 2007-2020 VMware, Inc. or its affiliates.  All rights reserved.
+
+defmodule RabbitMQ.CLI.Queues.Commands.ReclaimQuorumMemoryCommand do
+  alias RabbitMQ.CLI.Core.DocGuide
+
+  @behaviour RabbitMQ.CLI.CommandBehaviour
+  def scopes(), do: [:diagnostics, :queues]
+
+  use RabbitMQ.CLI.Core.MergesDefaultVirtualHost
+  use RabbitMQ.CLI.Core.AcceptsOnePositionalArgument
+  use RabbitMQ.CLI.Core.RequiresRabbitAppRunning
+
+  def run([name] = _args, %{node: node_name, vhost: vhost}) do
+    case :rabbit_misc.rpc_call(node_name, :rabbit_quorum_queue, :reclaim_memory, [vhost, name]) do
+      {:error, :classic_queue_not_supported} ->
+        {:error, "This operation is not applicable to classic queues"}
+
+      other ->
+        other
+    end
+  end
+
+  def output({:error, :not_found}, %{vhost: vhost, formatter: "json"}) do
+    {:error,
+     %{
+       "result" => "error",
+       "message" => "Target queue was not found in virtual host '#{vhost}'"
+     }}
+  end
+  def output({:error, error}, %{formatter: "json"}) do
+    {:error,
+     %{
+       "result" => "error",
+       "message" => "Failed to perform the operation: #{error}"
+     }}
+  end
+  def output({:error, :not_found}, %{vhost: vhost}) do
+    {:error, "Target queue was not found in virtual host '#{vhost}'"}
+  end
+  use RabbitMQ.CLI.DefaultOutput
+
+  def usage() do
+    "reclaim_quorum_memory  [--vhost <vhost>] <quorum queue>"
+  end
+
+  def usage_additional do
+    [
+      ["<queue>", "Name of the quorum queue"]
+    ]
+  end
+
+  def usage_doc_guides() do
+    [
+      DocGuide.quorum_queues(),
+      DocGuide.memory_use()
+    ]
+  end
+
+  def help_section(), do: :operations
+
+  def description(), do: "Flushes quorum queue processes WAL, performs a full sweep GC on all of its local Erlang processes"
+
+  def banner([name], %{}),
+    do: "Will flush Raft WAL of quorum queue #{name} ..."
+end
diff --git a/deps/rabbitmq_cli/test/queues/reclaim_quorum_memory_command_test.exs b/deps/rabbitmq_cli/test/queues/reclaim_quorum_memory_command_test.exs
new file mode 100644
index 0000000000..bec7bab50d
--- /dev/null
+++ b/deps/rabbitmq_cli/test/queues/reclaim_quorum_memory_command_test.exs
@@ -0,0 +1,45 @@
+## This Source Code Form is subject to the terms of the Mozilla Public
+## License, v. 2.0. If a copy of the MPL was not distributed with this
+## file, You can obtain one at https://mozilla.org/MPL/2.0/.
+##
+## Copyright (c) 2007-2020 VMware, Inc. or its affiliates.  All rights reserved.
+
+defmodule RabbitMQ.CLI.Queues.Commands.ReclaimQuorumMemoryCommandTest do
+  use ExUnit.Case, async: false
+  import TestHelper
+
+  @command RabbitMQ.CLI.Queues.Commands.ReclaimQuorumMemoryCommand
+
+  setup_all do
+    RabbitMQ.CLI.Core.Distribution.start()
+
+    :ok
+  end
+
+  setup context do
+    {:ok, opts: %{
+        node: get_rabbit_hostname(),
+        timeout: context[:test_timeout] || 30000
+      }}
+  end
+
+
+  test "validate: treats no arguments as a failure" do
+    assert @command.validate([], %{}) == {:validation_failure, :not_enough_args}
+  end
+
+  test "validate: accepts a single positional argument" do
+    assert @command.validate(["quorum-queue-a"], %{}) == :ok
+  end
+
+  test "validate: when two or more arguments are provided, returns a failure" do
+    assert @command.validate(["quorum-queue-a", "one-extra-arg"], %{}) == {:validation_failure, :too_many_args}
+    assert @command.validate(["quorum-queue-a", "extra-arg", "another-extra-arg"], %{}) == {:validation_failure, :too_many_args}
+  end
+
+  @tag test_timeout: 3000
+  test "run: targeting an unreachable node throws a badrpc" do
+    assert match?({:badrpc, _}, @command.run(["quorum-queue-a"],
+                                             %{node: :jake@thedog, vhost: "/", timeout: 200}))
+  end
+end