Deaths and infections from the novel coronavirus have been on a rising trajectory in Iran since hitting a months-long low in May.
This has prompted Iran to make wearing masks mandatory in enclosed spaces and reimpose restrictions lifted gradually since April to reopen the economy.
Health Ministry spokeswoman Sima Sadat Lari said in televised remarks that from Monday to Tuesday, 2,751 people tested positive for the coronavirus.
The number is the highest since June 5, when the ministry reported 2,886 infections in one day.
The latest count takes the total cases identified in Iran since late February to 314,786, Lari added.
Another 212 people died from the virus from Monday to Tuesday, bringing the overall toll to 17,617.
So far, 272,535 coronavirus patients have recovered from the disease or have been discharged from the hospital, she noted.
Among those undergoing treatment in medical centers at present, 4,132 patients are in critical condition, Lari said.
The spokeswoman added that more than 2,560,000 coronavirus diagnostic tests have been carried out in Iran until now.
Iran’s deputy health minister called for those who fail to obey the mask rules to be fined, as the only penalty currently in place is the refusal of service in public places.
“Deterrent methods must be used, one of which is fining those not wearing masks,” ISNA quoted Iraj Harirchi as saying.
Tasnim and AFP contributed to this story.