To withdraw from a semester a student has to visit the deanship of admission and registration and fill out an “Official Withdrawal Request Form”.
https://www.asu.edu.bh/admission/registration-form/
Besides, the student may apply for postponement of his/her studies prior to the commencement of the academic semester to be postponed provided that he/she presents an excuse accepted by the competent authority, according to the following:
 The Dean of the College may give consent to the student for the postponement of one semester, provided that it must not exceed four consecutive, or nonconsecutive, academic semesters.
 The College Council may give consent to the student for the postponement of four semesters, provided that it must not exceed six consecutive, or nonconsecutive, academic semesters.