Police on Friday issued a missing person bulletin for 15-year-old Alexandros Christodoulou from Limassol.
The teenager was reported missing from his home since 7am on Monday.
Christodoulou is thin, 1.80 metres tall, with blonde hair, police said.
When he left his home he was wearing denim shorts and a dark T-shirt.
Anyone with any information should contact Limassol CID, the nearest police station, or the public hotline 1460.