If you mistakenly deleted a discussion topic or forum, you can restore it and any posts that might have been there. 

To restore a discussion:

1. Select "Discussions" from the navbar.
2. Select More Actions.
3. Select Restore.
4. Select the "Restore" button under the Action column for the discussion that needs to be restored.

You can also restore deleted submission folders, quizzes, and grade items.

The following guides will walk you through how to restore the deleted items:

1. Restore a Deleted Grade Item
2. Restore a Deleted Submission Folder
3. Restore a Deleted Quiz
4. Restore a Discussion