A European diplomat close to the Iran nuclear deal says EU foreign ministers are expected to call for the accord's continued implementation.
The diplomat spoke shortly before US President Donald Trump was expected to urge US lawmakers to codify tough new requirements for Tehran.
The senior EU diplomat noted Friday that the Trump administration has already certified it twice, and that the International Energy Agency has done so eight times.
Should Trump decertify the deal, the diplomat said the EU's message to Iran "is very clear: you have to stick to the agreement."
The diplomat spoke on condition of anonymity because the person was not authorized to speak publicly.
The diplomat said the EU believes the nuclear deal is "a very good agreement because it has a very stringent, long-term verification and monitoring mechanism."