DUBAI (Reuters) -Iran remains committed to diplomacy with the United States, the government said on Monday, after a fourth round of nuclear talks with Washington due in Rome on May 3 was postponed for "logistical reasons".

The United States and Iran have begun a third round of nuclear talks, entering what experts describe as a more difficult phase of technical negotiations this weekend as Washington lays out its conditions.

Iran does not plan to give up enriching uranium, Foreign Minister Abbas Araghchi told state television on Saturday, as talks with the United States on limiting the country's nuclear programme were postponed.