Speaking at a rally to mark the anniversary of Iran's 1979 Islamic revolution, the president said that Iran had so far tried to develop nuclear energy within the framework of the nuclear treaty.
But he warned that if limits were placed on Iran's basic rights, then Tehran would have to reconsider its commitment to the nuclear treaty.
The warning came exactly a week after the International Atomic Energy Agency voted to refer Iran to the UN Security council over its disputed nuclear program.
Iran announced it would suspend voluntary cooperation with the UN's nuclear watchdog and will end snap inspections of its facilities by next week.
It has ordered the removal of surveillance cameras from nuclear plants and says it will end its freeze on full uranium enrichment.
Iran denies claims by the United States and Europe that it is covertly trying to develop nuclear weapons, and insists its program is purely for energy production
The Nuclear Non-Proliferation Treaty has been signed by 187 countries. It was created to prevent new nuclear states emerging and to work towards nuclear disarmament.
North Korea announced its withdrawal from the treaty in 2003, making it the first state to take such a step.
A number of states that have nuclear weapons, such as Israel, India and Pakistan, have never signed the treaty.