Fezeshkian, a former heart surgeon and health minister, said the moral police's actions in enforcing strict dress codes on women were “immoral” and promised a different approach.
The vote is to replace former President Ebrahim Raisi, who died on May 19 when the helicopter he was riding crashed into a mountain, killing seven others.
Iran has 61.5 million voters, but voter turnout is expected to be low in this election. It hit an all-time low in the National Assembly elections last March and the last presidential election in 2021.
Previous unofficial estimates had put voter turnout at just under 40% of those eligible to vote, which, if confirmed, would be the lowest turnout in Iran's presidential election history since the 1979 Islamic Revolution.
The country's top authority, Supreme Leader Ali Khamenei Ayatollah, called for a “maximum” turnout.
Iran has been rocked by massive protests since the death of 22-year-old Martha Amini, who was detained by moral police in 2022 for violating the country's strict dress code.
Human rights groups say the crackdown has left hundreds of people dead and thousands detained.
