Iran has said it "will not accept any amendments in (the nuclear) agreement, be it now or in the future, and it will not allow any other issues to be linked to (it)".
Zarif further accused the USA of failing to fulfill its commitments under the agreement.
Iran rebuffed French Foreign Minister Jean-Yves Le Drian's calls to curb its missile programme after a day of tense discussions in Tehran on Monday aimed at salvaging its historic nuclear deal.
On Saturday, Deputy Chief of Staff and Spokesman of Iran's Armed Forces Brigadier General Massoud Jazzayeri announced that Tehran will hold talks on its missile program only if the USA and European countries destroy their atomic warheads and long-range missiles.
Araghchi has also said that the deal's expected economic benefits are yet to materialize because companies fear running afoul of USA sanctions.
Le Drian arrived in Tehran on Monday for talks with Iranian officials on mutual ties as well as regional and global issues.
"The JCPOA represents a significant gain for verification", Amano said, according to a text of his speech published by his agency.
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United trailed to goals from Andros Townsend and Patrick van Aanholt before Chris Smalling gave the visitors a lifeline. Since Sir Alex Ferguson stepped down as manager, Manchester United has struggled to secure a top four finish.
He was scheduled to meet with President Hassan Rohani and Foreign Minister Mohammad Javad Zarif to discuss "bilateral, regional, and worldwide issues", including the JCPOA implementation.
France has ballistic missiles with ranges of more than 6,000 kilometres, which can be launched from submarines, but Le Drian said Iran was risking fresh sanctions if it did not curb its missile programme, which is now limited to 2,000 kilometres.
Iranian Foreign Minister Mohammad Javad Zarif says Europe must pressure the United States to fulfill its obligations under the 2015 nuclear agreement amid Washington's threat to pull out of it.
"The condition for negotiations on Iran's missiles is the destruction of America's and Europe's nuclear weapons and long-range missiles", Brigadier General Masoud Jazayeri told the official IRNA news agency.
Le Drian will also be pushing in his talks to have Tehran put pressure on the Syrian regime, a key ally, to end its devastating assault on the rebel enclave of Eastern Ghouta near Damascus.
Last year, Iran signed a $5-billion gas exploration deal with French energy giant Total, Tehran's biggest since the nuclear accord.
Weapons programs and Syria aside, Paris and Tehran have growing economic interests, and Le Drian is likely to engage Iranian officials in business discussions.
Le Drian's visit was originally scheduled for January but was delayed due to a political crisis that saw several student-led mass street protests against the cleric-led government break out in dozens of Iranian cities.