Yes, I know that there are/were a few. Understandably, students that require more than 2 attempts at the APMLE part 1 exam would be evaluated on a case-by-case basis. I hope the exam went well for you (or for whoever's behalf you are posting ).
I have heard of a few. At my program if you have to take it a 3rd time you are held back a year and it is your last chance before dismissal. Good luck OP!