Team Melli, who has previously defeated Ukraine and Brazil, will face Egypt in the semifinals on Thursday.
Volleyball has a rich Paralympic history. It was added to the program in 1976, with standing volleyball taking place and sitting volleyball as a demonstration sport.
From 1980 to 2000, both standing and sitting events were contested for men, with sitting volleyball added for women in 1980.
Iran is looking for its eighth gold medal in the Paralympics.