Manouchehr Mottaki said on Wednesday: "Taking into account the current context, the possibility of Iran's case being sent to the Security Council is weak."
He nevertheless warned Britain, France and Germany - which are pushing for Iran's case to be sent to New York - not to take any "hasty steps".
"I hope the Europeans have understood Iran's very clear and direct message and do not make any hasty decision ... which would complicate the situation for all sides," he said.
Iran's Supreme Leader, who has the last word on all matters of state, echoed Mottaki on Wednesday, saying the world could not deflect Iran from its "scientific developments".
Ayat Allah Ali Khamenei said: "The Islamic Republic, based on its principles, without being scared of the fuss created, will continue on its path of scientific developments and the world cannot influence the Iranian nation's will.
Khamenei said nuclear arms are
against Islamic teachings
"We are not after nuclear weapons and the West knows this because obtaining nuclear weapons is against the country's political and economic interests and is against Islamic teachings.
"The International Atomic Energy Agency has accepted that we are now part of the atomic club."
Iran's decision to resume sensitive nuclear fuel research has intensified fears that the clerical regime is seeking the bomb.
The country insists that it wants only to make reactor fuel to generate electricity.