I've been accepted to a top 20 Computer Science department with a RA, TA and fellowship. I decided to defer my admissions a year due to unforeseen circumstances. I was informed the school does not allow deferment, and my adviser told me to simply reapply next year. If I was accepted to the university this academic year, should I be able to get accepted next Fall? My application will be the exact same as it was this year including my recommendation letters, personal statement, and research experience.
I would assume that your chances to be readmitted are not high: the graduate committees would probably remember that you did not come last year, and will not want to risk another deferral. It is not like a faculty position re-application in which the recruiting committee has more time to think through process, and would have time to evaluate the chances that an applicant that deferred in the past would come this year. In graduate school admissions, I believe decisions are made quite fast.