It is not immediately clear what the proposal includes - whether it concerns the Iran war in general or only, for example, the blocked Strait of Hormuz.
The proposal was submitted on Thursday evening, writes the state news agency IRNA.
The US and Israel attacked Iran on February 28, triggering the Iran-Iraq War. A ceasefire has been in place for much of April, and the US president claims that negotiations are underway. However, the parties are said to be far apart, including on Iran's nuclear program.
