By chance I happened upon this play string in a game: K+WP.BX3(E2/TH)(2). The parser does not award a putout to the catcher or a third of an inning to the pitcher. The reason is that the parser specifically suppresses putouts by the catcher on a dropped third strike - except of course in very rare circumstances the catcher winds up making the putout anyway!
I am guessing this may never have happened in the Retrosheet corpus otherwise I assume I would have noticed it in regression testing...