"While there are sanctions on Iran, it will be hard to preserve the trade relations [with Iran]", Iraqi government spokesman Saad al-Hadithi said.
The sanctions are meant to hinder Tehran's acquisition of USA currency; its precious metals trade; bank transactions denominated in the Iranian rial; activities related to Iran's sovereign debt; and the country's automotive sector. "We are asking global Britain to use its considerable diplomatic power and influence and join us".
The US pullout has been met with disbelief by European allies, who issued a statement on Monday committing to the 2015 deal and encouraged investors to maintain business ties with Iran.
The move also upheld a campaign-era promise of Trump's and dealt a significant blow to former President Obama's global agreement.
He said Iran needed to make tangible and sustained changes to behave like a normal country. The US will also sanction companies in third countries, such as Morocco, from trading both with Iran and the US.
Despite opposition from European allies, US President Trump in May pulled the United States out of a deal between world powers and Tehran under which global sanctions were lifted in return for curbs on Iran's nuclear program.More news: Manchester United Make Diego Godin Approach
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"America is turning up the pressure and we want the United Kingdom by our side".
Earlier this week, British Minister for Middle East Affairs Alistair Burt backed the current deal negotiated with Iran, rejecting the idea that the United Kingdom would "go along with" the US.
It saw the regime agree to curb its nuclear programme in return for the lifting of sanctions.
"America is turning up the pressure and we want the U.K.by our side", Ambassador Woody Johnson, who owns the New York Jets with his brother, wrote in an op-ed published Sunday in the Telegraph.
Since then, Britain, France and Germany have sought to keep the deal alive, while Trump has prepared new sanctions, saying a broader and more balanced deal is needed.
Tensions between Trump and Iranian President Hassan Rouhani have ratcheted up in recent months amid USA -imposed sanctions on Iran.