diff --git a/plugins/discourse-calendar/app/models/discourse_post_event/invitee.rb b/plugins/discourse-calendar/app/models/discourse_post_event/invitee.rb
index 92b298a06ff43..44b0bb8af1932 100644
--- a/plugins/discourse-calendar/app/models/discourse_post_event/invitee.rb
+++ b/plugins/discourse-calendar/app/models/discourse_post_event/invitee.rb
@@ -9,7 +9,14 @@ class Invitee < ActiveRecord::Base
     belongs_to :event, foreign_key: :post_id
     belongs_to :user
 
-    default_scope { joins(:user).includes(:user).where.not(users: { id: nil }) }
+    default_scope do
+      joins(:user)
+        .includes(:user)
+        .merge(User.not_suspended)
+        .merge(User.not_silenced)
+        .merge(User.not_staged)
+        .where.not(users: { id: nil })
+    end
     scope :with_status, ->(status) { where(status: Invitee.statuses[status]) }
 
     after_commit :sync_chat_channel_members
diff --git a/plugins/discourse-calendar/app/services/discourse_post_event/chat_channel_sync.rb b/plugins/discourse-calendar/app/services/discourse_post_event/chat_channel_sync.rb
index b981f39b41ef2..5adefca8ff1d9 100644
--- a/plugins/discourse-calendar/app/services/discourse_post_event/chat_channel_sync.rb
+++ b/plugins/discourse-calendar/app/services/discourse_post_event/chat_channel_sync.rb
@@ -12,11 +12,15 @@ def self.sync(event, guardian: nil)
 
     def self.sync_chat_channel_members!(event)
       missing_members_sql = <<~SQL
-        SELECT user_id
-        FROM discourse_post_event_invitees
-        WHERE post_id = :post_id
-        AND status in (:statuses)
-        AND user_id NOT IN (
+        SELECT i.user_id
+        FROM discourse_post_event_invitees i
+        INNER JOIN users u ON u.id = i.user_id
+        WHERE i.post_id = :post_id
+        AND i.status IN (:statuses)
+        AND (u.suspended_till IS NULL OR u.suspended_till <= :now)
+        AND (u.silenced_till IS NULL OR u.silenced_till <= :now)
+        AND u.staged = false
+        AND i.user_id NOT IN (
           SELECT user_id
           FROM user_chat_channel_memberships
           WHERE chat_channel_id = :chat_channel_id
@@ -32,6 +36,7 @@ def self.sync_chat_channel_members!(event)
             DiscoursePostEvent::Invitee.statuses[:interested],
           ],
           chat_channel_id: event.chat_channel_id,
+          now: Time.zone.now,
         )
 
       if missing_user_ids.present?
diff --git a/plugins/discourse-calendar/spec/integration/invitee_spec.rb b/plugins/discourse-calendar/spec/integration/invitee_spec.rb
index 2ee61c79a53bc..9f9382c79b148 100644
--- a/plugins/discourse-calendar/spec/integration/invitee_spec.rb
+++ b/plugins/discourse-calendar/spec/integration/invitee_spec.rb
@@ -27,4 +27,48 @@
       end
     end
   end
+
+  describe "default scope filtering" do
+    fab!(:regular_user, :user)
+    fab!(:suspended_user) { Fabricate(:user, suspended_till: 1.year.from_now) }
+    fab!(:silenced_user) { Fabricate(:user, silenced_till: 1.year.from_now) }
+    fab!(:staged_user) { Fabricate(:user, staged: true) }
+
+    before do
+      post_event.create_invitees(
+        [
+          { user_id: regular_user.id, status: DiscoursePostEvent::Invitee.statuses[:going] },
+          { user_id: suspended_user.id, status: DiscoursePostEvent::Invitee.statuses[:going] },
+          { user_id: silenced_user.id, status: DiscoursePostEvent::Invitee.statuses[:going] },
+          { user_id: staged_user.id, status: DiscoursePostEvent::Invitee.statuses[:going] },
+        ],
+      )
+    end
+
+    it "excludes suspended users from invitees" do
+      expect(post_event.invitees.map(&:user_id)).not_to include(suspended_user.id)
+    end
+
+    it "excludes silenced users from invitees" do
+      expect(post_event.invitees.map(&:user_id)).not_to include(silenced_user.id)
+    end
+
+    it "excludes staged users from invitees" do
+      expect(post_event.invitees.map(&:user_id)).not_to include(staged_user.id)
+    end
+
+    it "includes regular users in invitees" do
+      expect(post_event.invitees.map(&:user_id)).to include(regular_user.id)
+    end
+
+    it "includes users whose suspension has expired" do
+      suspended_user.update!(suspended_till: 1.day.ago)
+      expect(post_event.invitees.map(&:user_id)).to include(suspended_user.id)
+    end
+
+    it "includes users whose silence has expired" do
+      silenced_user.update!(silenced_till: 1.day.ago)
+      expect(post_event.invitees.map(&:user_id)).to include(silenced_user.id)
+    end
+  end
 end
diff --git a/plugins/discourse-calendar/spec/services/discourse_post_event/chat_channel_sync_spec.rb b/plugins/discourse-calendar/spec/services/discourse_post_event/chat_channel_sync_spec.rb
index 2879e23c94d05..f75ecc351232d 100644
--- a/plugins/discourse-calendar/spec/services/discourse_post_event/chat_channel_sync_spec.rb
+++ b/plugins/discourse-calendar/spec/services/discourse_post_event/chat_channel_sync_spec.rb
@@ -33,4 +33,72 @@
 
     expect(event.chat_channel.name).to eq(admin_post.topic.title)
   end
+
+  describe "user filtering" do
+    fab!(:suspended_user) { Fabricate(:user, suspended_till: 1.year.from_now) }
+    fab!(:silenced_user) { Fabricate(:user, silenced_till: 1.year.from_now) }
+    fab!(:staged_user) { Fabricate(:user, staged: true) }
+    fab!(:regular_user, :user)
+
+    it "does not add suspended users to the chat channel" do
+      event = Fabricate(:event, chat_enabled: true, post: admin_post, name: "Test Event")
+      event.create_invitees(
+        [user_id: suspended_user.id, status: DiscoursePostEvent::Invitee.statuses[:going]],
+      )
+      event.save!
+
+      expect(event.chat_channel.user_chat_channel_memberships.pluck(:user_id)).not_to include(
+        suspended_user.id,
+      )
+    end
+
+    it "does not add silenced users to the chat channel" do
+      event = Fabricate(:event, chat_enabled: true, post: admin_post, name: "Test Event")
+      event.create_invitees(
+        [user_id: silenced_user.id, status: DiscoursePostEvent::Invitee.statuses[:going]],
+      )
+      event.save!
+
+      expect(event.chat_channel.user_chat_channel_memberships.pluck(:user_id)).not_to include(
+        silenced_user.id,
+      )
+    end
+
+    it "does not add staged users to the chat channel" do
+      event = Fabricate(:event, chat_enabled: true, post: admin_post, name: "Test Event")
+      event.create_invitees(
+        [user_id: staged_user.id, status: DiscoursePostEvent::Invitee.statuses[:going]],
+      )
+      event.save!
+
+      expect(event.chat_channel.user_chat_channel_memberships.pluck(:user_id)).not_to include(
+        staged_user.id,
+      )
+    end
+
+    it "adds regular users to the chat channel" do
+      event = Fabricate(:event, chat_enabled: true, post: admin_post, name: "Test Event")
+      event.create_invitees(
+        [user_id: regular_user.id, status: DiscoursePostEvent::Invitee.statuses[:going]],
+      )
+      event.save!
+
+      expect(event.chat_channel.user_chat_channel_memberships.pluck(:user_id)).to include(
+        regular_user.id,
+      )
+    end
+
+    it "adds users whose suspension has expired to the chat channel" do
+      formerly_suspended = Fabricate(:user, suspended_till: 1.day.ago)
+      event = Fabricate(:event, chat_enabled: true, post: admin_post, name: "Test Event")
+      event.create_invitees(
+        [user_id: formerly_suspended.id, status: DiscoursePostEvent::Invitee.statuses[:going]],
+      )
+      event.save!
+
+      expect(event.chat_channel.user_chat_channel_memberships.pluck(:user_id)).to include(
+        formerly_suspended.id,
+      )
+    end
+  end
 end