I think there is not any option like that on facebook where you can check how many people blocked you.
Send them all a message when you friend to them, one by one send just a HI! (username) or something. When you than scroll down to the list in sent message you will see them blocked out. So either they blocked your or their profile is gone.
There have been several apps in the past that were in place to detect deleted friends and FB simply shuts them down - they obviously don't want you to see who's deleted, blocked, etc for privacy related issues. From my knowledge, these apps were pushed for a bit but the fad has died out - they no longer exist long enough to do any real tracking, therefore have become useless.