10k rep members are allowed to see deleted questions, is there a way to find questions that were deleted or to see a list of them somewhere?
If you have 10k rep, you can also see a list of recently deleted questions in the Moderation Tools.
For very recently deleted questions where you know the exact title you may be able to see the google cached version of the page. Google the exact title, click on the down arrow next to the green link, click "Cached".
deleted:1 in your search to see your own deleted posts, assuming you have over 10k rep.
Viewing deleted posts
You now have privileged access to posts that have been removed, either by their authors, by users with access to moderator tools, by moderators, or by the system.
Use this privilege wisely:
Make sure what is being deleted should have been deleted, and bring unnecessary or harmful deletions to the attention of the
community and/or moderator team.
Watch for signs of abuse being obscured by deletion. Don't abuse this privilege to stir up trouble when someone has wisely decided to remove a problematic post.
You also have a new search operator available to find your own deleted posts: deleted:1.
You need to have the direct link to the question. They also show up if you have previously starred them as a favorite question.
Probably not possible (without access to moderator tools), but if these are your own questions and you were down-voted for these questions, go to 'reputation' from your profile and select 'show removed posts', they'll appear, but not linked. Based on the removed title, you may try to find the direct link either in your web-browser history, Google Cache or Wayback Machine.
Go to your Inbox and search for messages related to the question you are looking for. This solution works whatever reputation you have, and even if the question was deleted over 60 days ago.