Iranian Foreign Minister Mohammad Javad Zarif left Moscow for Tehran on Friday morning, IRNA reported.
The Iranian foreign minister visited the Russian capital to attend the Shanghai Cooperation Organization's meeting there.
Before Departing for Tehran, Zarif urged the Western countries to harness their excessive demands and respect the Lausanne understanding if they really want a deal with Iran.
'If the other side shows respect for what was agreed in Lausanne, Switzerland, and attempts to write the text of the final agreement on the basis of mutual respect, then we can strike a deal by the July 1 deadline,' Zarif told the Lebanese al-Manar TV Moscow on Thursday.
The Iranian foreign minister, meantime, warned that if the western countries insist on their excessive demands in the negotiations, then the situation will grow difficult.
Zarif expressed the hope that Tehran and the World powers would reach an agreement before the deadline.