A young Iranian man took his own life at the Brisbane airport on Tuesday, after what refugee advocates believe was months of depression and despair.

Supporters told Fairfax Media the man, thought to be either 25 or 26 years old, had travelled to Brisbane recently, after his release from a Melbourne hospital.

Refugee advocates say an Iranian man endured months of depression before he died at Brisbane Airport. Credit:Michelle Smith

They said he was met by police at the airport and placed in a hotel, which he later left, returning to the airport in the early hours of Tuesday morning, and suicided.

A Queensland Police spokeswoman confirmed officers attended a non-suspicious sudden death at the Brisbane Airport on Tuesday and a report was being prepared for the Coroner.