According to Merkel, there are some points of contention in relations between the European Union and Tehran, including Iran's ballistic missile program.
Mogherini says "there was awareness of the urgency" and the four ministers agreed to find some solutions within weeks.
Canceling a nuclear agreement between world powers and Iran would be wrong, German Chancellor Angela Merkel has said, adding that the USA withdrawal from the deal was among several pieces of "troubling news" that had occurred recently.
Merkel told lawmakers that Germany's economy is on a good path and the government plans to increase its spending on defense and scientific research to ensure the country can meet the security challenges of the future and remain a leading industrial power.
She added: "Britain, France and Germany were of the opinion that the agreement against Iran's nuclear armament is an agreement that certainly has weaknesses, but an agreement we should stand by".
What are you hearing: Yanny or Laurel?
However, they report that age isn't the only reason that the audio may be heard differently by different people. It's crucial, she adds, to "use your experience with sound and what you know about it to fill in the gaps".
The best way to address global concern about Iran's role in the region and its ballistic missile programme is within the framework of the nuclear deal.
Iran has described the sanctions as illegal and has warned that if talks to rescue the accord fail, it would ramp up its nuclear programme to a level more advanced.
"This agreement is anything but ideal", she told lawmakers, but noted that the United Nations nuclear watchdog has confirmed Iran is abiding by its terms.
At meetings with Iranian Foreign Minister Mohammad Javad Zarif in Brussels on May 15, the European signatories vowed to keep the JCPOA alive despite the US withdrawal.
British, French and German foreign ministers met in Brussels on Tuesday to see how they can save the nuclear deal without the United States, but appeared hard-pressed over how their companies could continue doing business with Iran once Washington begins to reimpose sanctions.