Abdolmehdi Hamouri scored Team Melli’s only goal in the match.
Iran had already defeated Italy and the Netherlands in Group B.
Iran is scheduled to meet Cameroon on Sunday.
The Deaflympics had initially been scheduled to take place from December 5 to 21 in 2021, but was postponed due to COVID-19 complications.
There are 209 events in 17 sports on the Deaflympics program.
Athletics, badminton, cycling, golf, judo, karate, orienteering, shooting, swimming, table tennis, taekwondo, tennis, wrestling, basketball, football, handball and volleyball are the 17 sports.
The last summer Deaflympics took place in 2017 in the Turkish city of Samsun.