"Iran`s leaders say that their nuclear program is for medical research and electricity," Obama said in a video message. "To date, however, they have been unable to convince the international community that their nuclear activities are solely for peaceful purposes. That`s why the world is united in its resolve to address this issue and why Iran is now so isolated."
Obama made the comments in his annual video on Nowruz, the Iranian new year.
This year, the Nowruz comments came a day before Obama departs for Israel on a trip in which Iran will be a major agenda topic.
Israeli officials say Iran is seeking the means to make a nuclear weapon.
"Since taking office, I have offered the Iranian government an opportunity," Obama said. "If it meets its international obligations, then there could be a new relationship between our two countries."
But the nuclear issue must be resolved, Obama said, adding that he hopes for a diplomatic solution.
"If we can, the Iranian people will begin to see the benefits of greater trade and ties with other nations, including the United States," Obama said. "Whereas if the Iranian government continues down its current path, it will only further isolate Iran. This is the choice now before Iran`s leaders."
More about:
