Abstract : To find the causes of surgical cancellations in patients attending a preoperative assessment clinic and scheduled for surgery at our institution. This audit included all those patients who presented to the preoperative assessment clinic with their surgeries planned in the main operating rooms of our hospital. The duration of this audit was three months. Canceled cases were identified from the operating room lists and the reasons for cancellations were categorized into two factors. forty-seven (47) cancellations were identified; clinical problem (66%) and administration factors (34%). In clinical problems, the most common causes are upper respiratory tract infections (URTI) and listen for wheezes, cough, rales, or lower airway rhonchi preoperative examination, which was found on 9 (19%) and 8 (17%) patients. Meanwhile, the availability of NICU (neonatal intensive care unit) or PICU (pediatric intensive care unit) space is the main reason for surgical cancellation related to administration factors, amounting to 8 (17%) Patients (Table 3A and Table 3B). Most of the patient-related factors were found to be uncontrollable. Administration factors related to cancellations might be reduced with better communication between Anesthetic themselves and the surgeons