US envoy for Iran, Abram Paley, met on Friday with the family of Sharmahd, who was convicted of heading a pro-monarchist group accused of a deadly bombing in 2008.
The pardon approved by Ayatollah Ali Khamenei came with conditions which said the measure would not apply to any of the numerous dual nationals held in Iran.
Farhad Meysami has been jailed since 2018 for supporting women activists protesting against the headscarf police.
In the 120 days since the protests on 2022, Iran has ruthlessly murdered at least 525 protesters and detained and tortured countless more.