He was later identified later as Mr Jeans Viktor Bengtson.
Police said they were alerted of the incident at 2.40 am Saturday.
His English friend who rented the room on the 13th floor of the condominium told the police that his Swedish friend earlier has been in deep stress after complaining about his family in Sweden is coming to bring him back home.
He said Mr Bengtson was wandering around in the capital after his family posted on the Internet asking help from people to locate him.
He said he found Mr Bengtson at Khao Sarn road and brought him to stay at the condominium, waiting for his family to pick him back home.
Before he jumped out from the balcony of the room, he complained about his family trying to get him back home, police said.
Police said they inspected the rented room and found no trace of fighting which could confirm a murder.
His body was sent to Police General Hospital for autopsy test.