I recently helped to delete this question in which I had an answer with 4 upvotes. Once it was deleted I lost the gained rep, but no Disciplined badge was awarded.
One could argue that it's not strictly a removal, because I've migrated my answer to its duplicate and coincidentally gained the same amount of up- and downvotes :)
Though, according to this old meta question it would seem that when questions containing your answer are deleted you're indeed eligible for the badge.
I've waited the recommended 24 hours :) Did I miss something obvious?
Okay, I did miss something obvious as it turned out. The user from the aforementioned question had temporarily deleted their answer, thereby "illegally" obtaining the badge before reinstating it.
Though, could this then be a feature request perhaps? If you helped to delete a question where your own answer has 3+ votes, you would get it? =D =D