Mehdi Shirmohammadi, Abbas Rezaei and Hadi Farahmand were on target for Iran.
Iran has been drawn in Group B with Belarus, the UAE and Azerbaijan.
Russia, Uzbekistan, Oman and Egypt are in Group A.
The 2nd CIS Games are being held in Belarus from August 4 to 14.
The CIS Games are a regular complex event in the field of physical culture and sports, covering national sports, the most popular within the CIS member states, Olympic and non-Olympic sports.