Team Melli has been pitted against Brazil and Poland in Pool B.
Pool A consists of host USA, France and Russia.
Iran will start the campaign with a match against Poland on July 11. The Persian face Brazil a day later.
The competition will take place in the Credit Union 1 Arena, Chicago, United States From July 10 to 14.
This will be the first edition of the World League or the Nations League to have the Final Round hosted in North America.