The Iranian delegation led by Mohammad Bagher Ghalibaf has left Doha and is returning to Tehran.
The move comes at a sensitive moment in ongoing US Iran negotiations linked to a possible peace framework.
Talks have been focused on ending the conflict and stabilizing the Strait of Hormuz. This waterway is one of the most important energy routes in the world.
Any agreement could allow freer movement of oil and shipping through the strait. That would ease global supply pressure and reduce energy market volatility.
Recent reports suggest both sides are still working on a framework deal. However, officials have also warned that a final agreement is not yet close.
Iran US peace deal discussions continue as oil and gas markets react to diplomatic signals
Markets have been reacting strongly to every update in the negotiations. Oil prices have fallen on expectations of improved supply flow through the Strait of Hormuz.
At the same time, diplomatic uncertainty remains high. Leaders from both Iran and the United States have signaled that talks are progressing but not finalized.
US President Donald Trump has said discussions are moving forward but warned that conditions must be met before any agreement is signed.
Iranian officials have also indicated that key issues around shipping control and security in the Strait of Hormuz are still unresolved.
Strait of Hormuz negotiations remain central to global energy stability outlook
The Strait of Hormuz remains the core issue in the talks. Around one fifth of global oil supply passes through this route.
Any disruption or reopening directly affects global oil and gas prices. That is why energy markets are reacting so sharply to political signals.
Even small updates from negotiations are moving crude oil and natural gas prices.
With the Iranian delegation now returning to Tehran, markets are watching closely for the next phase of talks and whether progress continues or stalls.