Peel Regional Police are looking for a young boy described as a vulnerable child who may be non-verbal.
Three-year-old Zaid was last seen at 6:20 p.m. on Thursday in the area of Erindale Park in Mississauga.
He is described as having a thin build with a short, dark afro haircut. He was wearing a yellow top with red writing and black pants with no shoes or socks when he went missing.
A source tells CityNews that police are possibly expanding their search to nearby waterways.
Police are asking anyone who sees him to call 9-1-1 immediately.