A post that, after an edit was suggested, is deleted, still has the "Edit (1)" link in the post menu. When you try to review that suggested edit from the Q&A page, and click 'Approve' in the popup with the review item, you get an error message:
This post has been deleted; no edit suggestions are available
That might make sense, but I'm reporting this bug because the inconsistency here is that it is possible to review the edit from the review queue: proof.
If Suggested edits to posts which no longer exist should be automatically removed is implemented, then this bug is also fixed, but if it's not (the post can get undeleted later, even because the suggested edit might make it worth undeleting), this inconsistency should be fixed.