There were however plans to impose some restriction at holy Shi'ite sites and cancel some sermons on Friday, the Islamic Republic's traditional day of public prayer, said Health Minister Saeed Namaki.
Iran has had the highest number of deaths from the virus outside China, where it emerged in late 2019. Health ministry spokesman Kianush Jahanpur said 139 people had been infected.
Officials announced Iran's first deaths and infections from the coronavirus as recently as last week, and the sharp rise in numbers in a short time has led Iranians to criticize authorities online and accuse them of a cover-up, a charge officials have denied