If at any time you leave the University but plan to return, you may wish to apply for a leave of absence. If you simply withdraw, you will have to apply for readmission. A leave of absence may be approved if you are in good academic standing and owe no currently-due debts to the University. For a more detailed description of eligibility and procedures, consult the Standards and Procedures for Graduate Study at UCLA.
If you must discontinue your studies for any reason before the end of a quarter in which you are enrolled, be sure to submit a withdrawal form. Otherwise you will receive F's in courses, and it will be difficult to reenter this or any other graduate program.