The final will be held between Portugal and Italy.
The competition is being held in Luque, Paraguay from November 21 to December 1.
Match commissioners are the official representatives of a governing body at a game and are responsible for ensuring the match is properly organized and runs smoothly.
Shahriari, who is head of Beach Soccer at the Iran Football Association, had also been chosen as match commissioner at the 2018 Summer Youth Olympics for the futsal competitions.