"The Islamic Republic of Iran will always stick to its international commitments," Rouhani said in a televised cabinet meeting.
But if the US wants "to press forward with new sanctions under any pretext... The great nation of Iran will respond appropriately," he said.
"We will not forgive violations by the Americans and we will stand against them."
His comments came a day after the US and Iran traded tit-for-tat sanctions over the Islamic republic's ballistic missile programme.
Iran hit back with its own sanctions against "American people and entities that have acted against the Iranian people and other Muslim peoples of the region."
Rouhani today accused Washington of "duplicity".
"On one hand they send official reports to Congress verifying that Iran has been completely loyal to the nuclear deal," Rouhani said.
"On other hand they seek new sanctions under various excuses against logic (and) the spirit and text" of the accord, he said.
An overwhelming majority of lawmakers voted to prioritise the motion that would see an additional USD 260 million allocated to developing the missile programme and the same amount to the elite Revolutionary Guards' foreign operations wing, the Quds Force.
Rouhani accused his American counterpart Donald Trump of breaking international deals on Cuba, North Korea and climate change, all reached under Trump's predecessor Brack Obama.
He said Washington was pushing Iran to "abandon its commitments" and that the US was "worried over improved economic relations between Iran and Asia and Europe".
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
