Team Melli Banovan had previously defeated Kyrgyzstan 3-0 and Tajikistan 3-0 in its opening matches.
Iran will play Uzbekistan in the final match on Sunday.
The competition was originally scheduled to be held in Kathmandu, Nepal, but was relocated to Tashkent.
The CAVA Women’s Volleyball Challenge Cup is an international volleyball competition for senior women’s national teams that are members of the Central Asian Volleyball Association, the sport’s regional governing body for Central and South Asia.