The Russian's body was found at a construction site adjacent to a seven-story residential complex in Phuket with a rooftop swimming pool.
Multiple injuries were found on his body, including wounds to the head.
He was wearing only black shorts, The Thaiger reports.
Before the body was removed from the basement to the surface, preliminary examinations were carried out.
Death of a tourist
The incident took place at a seven-storey condominium in Chalong, located in Muang district.
Police officers, along with hospital medics and volunteers, arrived at the scene.
The Russian's body was located next to a building on a construction site with a deep basement.
The young man was found lying face down on the ground.
Police are treating the death as tragic but not violent.
It is reported that the man was supposed to return to Russia that day, but he died.
Following the incident, authorities contacted the Russian embassy.
The family of the deceased has been informed to repatriate the body to his home country.