A total of 2,628 pediatric visits were included in the study. The overall proportion of nonattendance at the pediatric otolaryngology clinic was 33.0%. Nonattendance proportions were 32.7% between 7 AM and 9 AM; 28.3% between 9 AM and 2 PM, and 36.5% between 2 PM and 8 PM (P < .001). The proportion of nonattendance was 24.1% when there was a short waiting time for an appointment (0-7 days), and 36.3% when there was an intermediate waiting time (7-15 days), and 36.6% when there was a long waiting time (15 days and above)(P < .001, P < .012, respectively). CONCLUSIVE: Health provider determinants of nonattendance in pediatric otolaryngology clinic appointments include the waiting time for an appointment and the hour of the appointment within the day.