The 23-year-old was last seen by his family about 9.30am on 11 July at a property on Pearcedale Road.
He was last seen wearing a dark green camouflage jacket, rust coloured tracksuit pants, navy shoes and a grey cap.
Police have concerns for Harun’s welfare as his disappearance is considered out of character.
He is described as being 175cm tall, is of Turkish background and has short dark hair, brown eyes and a short stubble beard.
Harun has a tattoo on his left arm saying “Gazi M Kemal” and a scar on the top of his right hand.
He is known to frequent the Meadow Inn in Campbellfield, Coolaroo Hotel, Derrimut Hotel and the Barry Road, Campbellfield and Broadmeadows areas.
Harun does not drive and catches public transport, often trains on the Craigieburn, Upfield and Sunshine lines.
Police have released images of harun in the event someone recognises him and can provide information on his current whereabouts.
Anyone with information about Harun is urged to contact Fawkner Police Station on 9355 6000.