European Union foreign policy chief Javier Solana and Iran's chief nuclear negotiator are due to meet in Berlin today for talks aimed at resolving the dispute over Iran's nuclear programme.
Mr Larijani was originally scheduled to meet Mr Solana on the sidelines of the UN General Assembly in New York last week but never showed up.
"This meeting was finalised late last night," said a Western diplomat in Berlin who follows the Iran issue closely.
The United States, Britain, France, Germany, Russia and China have offered Tehran economic and political incentives if it suspends uranium enrichment, which the West believes is part of a nuclear weapons programme.
Tehran says its nuclear enrichment activities are aimed solely at generating electricity and has refused to halt them.
The Washington Timesreported earlier this week that Iran was close to a deal that would include a temporary, 90-day suspension of uranium enrichment and clear the way for nuclear talks.
An Iranian news agency, however, quoted a nuclear official who denied any plans for a suspension.
French officials said Mr Larijani offered to consider a temporary enrichment suspension at a meeting with Mr Solana earlier this month.
Western diplomats said details of this possible suspension would be discussed at today's meeting in Berlin.
If Iran does not suspend enrichment, the United States and the "EU3" - France, Germany and Britain - have agreed to ask the UN Security Council to impose sanctions on the Islamic republic.
China and Russia oppose sanctions and would prefer to reopen negotiations with Iran.