Ali Asqar Soltaniyeh, Iran's permanent representative to the International Atomic Energy Agency, made the comment at a news conference Tuesday held on the sidelines of the 16th Non-Aligned Movement summit in Tehran, the semi-official Fars news agency reported.
"Iran will not give up or compromise its ... right to use nuclear energy, fuel cycle and enrichment," the agency quoted him as saying.
"They [the West] should know that this nation will not retreat even an iota."
At the same time, he insisted, Iran would continue to cooperate with the IAEA, the agency said.
The U.N. Security Council has imposed four rounds of sanctions on the Islamic republic to convince it to halt its uranium enrichment and suspected effort to acquire nuclear weapons.