Qassemi had already received one silver and two bronze medals in free-style wrestling before the Rio 2016 wrestling competitions.
The 31st Olympic Games officially started in Rio, Brazil, on August 6.
A sum of 10,444 athletes from 206 countries compete in 28 sport fields in Rio.
64 Iranian athletes are competing in 14 sport fields of boxing, table tennis, shooting, bow and arrow, rowing, weightlifting, track and field, taekwondo, judo, fencing, volleyball, free-style wrestling, Greco-Roman wrestling, swimming and cycling.
