No afraid not… Unless you have it in a db backup…

We do have an open ticket to add a trash can style intermediate option but no ETA as its a big change…

I believe it may be in the last backup I did – if so, how do I go about finding the specific thread?

Look in the sftopics table… Look for topic name… Then with topic I’d, look in sfposts table and find all posts with that topic id. You will have to manually enter the posts yourself – or just export from the db those entries and import into current database