Haddadi was absent in the match against Australia in the FIBA World Cup qualifier's fifth and penultimate window Friday night, where Team Melli lost to Boomers 76-47.
The 2.18 center has already played for Chinese clubs Qingdao DoubleStar Eagles and Sichuan Blue Whales.
Haddadi has played in NBA teams Memphis Grizzlies, Dakota Wizards and Phoenix Suns.
The 33-year-old basketball player has reportedly reached an agreement with Xinjiang Guanghui Flying Tigers.