Iran's semiofficial Tasnim news agency described the negotiations as finished and having “no effect on breaking the deadlock in the talks”.
Iran refuses to hold direct talks with its arch-foe, the United States, resulting in the "proximity" talks arrangement involving European Union envoy Enrique Mora.
The launch comes a day after EU Foreign Policy Chief Josep Borrell announced that Iran and the United States would resume indirect talks to revive nuclear deal between Tehran and world powers.
Iran's Foreign Minister Hossein Amirabdollahian expresses hope at reaching a final nuclear agreement following a meeting in Tehran with European Union foreign policy chief Josep Borrell.
The veteran diplomat served as a close aide to Kim Jong Un during nuclear talks with the United States and accompanied the North Korean leader to summits with then US president Donald Trump.
Israeli Prime Minister Naftali Bennett has accused Iran of deceiving the international community about its atomic activities and said his country “reserves the right to self-defence“.
Officials from the United States, South Korea and Japan have met in Seoul for talks on North Korea amid signs the country is preparing to conduct a nuclear test for the first time since 2017.
Time needed for Tehran to produce a nuclear weapon is down from about a year, Washington says.
Tehran has passed on its proposals on the remaining issues to the American side through the EU senior negotiator, and now the ball is in US court, Iran's Foreign Minister Hossein Amirabdollahian said.
Complications have surfaced after Russia demanded guarantees that Western sanctions imposed on its economy would not affect its trade with Iran, analysts say.
Tehran finds itself in a geopolitical, economic, and diplomatic bind.
Several Iranian officials have said that a deal on Iran's nuclear programme is expected before the end of the week with some minor technical issues being discussed in Vienna.
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