Iran's foreign ministry spokesman Abbas Araqchi met here US Under Secretary of State for Political Affairs Wendy Sherman.
They discussed the necessary coordination for the upcoming nuclear talks with P5+1, according to the Iranian News Agency (IRNA).
The new round of talks between Iran and Group 5+1 is to begin in Lausanne on Thursday, and is expected to run until March 29.
The latest round of nuclear negotiations ended in Lausanne on March 20 after six days of intensive and serious talks between representatives from Iran, United States and the European Union.