<p>I'm currently a sophomore at UC Berkeley, but I've considered withdrawing for the fall semester due to personal reasons and moving back home. Would I be able to take classes at UCI during the fall quarter as a 'visiting' student of sorts?</p>
<p>You should ask your counselor @ Berkeley about the Intercampus Visitor Program. I believe that’s where they let you take a quarter of classes at a different UC although I’m not sure if you are limited to a single quarter. Outside this program, I’m pretty sure you can’t just casually enroll in classes at UCI. Also consider UCI Extension though that may be kind of expensive.</p>