Mousavi suffered a foot injury in the match against Russia in Week Three.
Team Melli will face Portugal on Friday in Ardabil’s Hossein Rezazadeh Hall.
Iran will also meet Australia and France on Saturday and Sunday.
Mousavi will miss Iran’s first two matches.
The 2019 FIVB Volleyball Men's Nations League is the second edition of the FIVB Volleyball Men's Nations League, an annual international men's volleyball tournament contested by 16 national teams.