To permanently delete a Facebook group, you must be its sole admin. Begin by removing every member individually via the “Members” tab. Once all members are removed, leave the group yourself. Facebook will automatically delete the group when the last member exits. This action is irreversible and removes all content. Deletion can be done through both the Facebook app and website. Ensure you\'re ready, as once deleted, the group and its discussions can’t be restored or recovered by anyone.