Leave Facebook Group:
1. From your News Feed tap Main Menu then tap Groups and select the group you want to leave.
2. Tap Joined below the cover photo and select Leave Group.
See: How to Search For Post in a Group
When you leave a group:
• Members won’t be notified if you leave.
• You’re removed from the member list and the group will be removed from your list of groups.
• You’ll no longer get group notifications or see group stories in News Feed.
• People will no longer know when you’ve seen a group post, even if you saw it before you left the group.