PARIS, July 3 (Reuters) -

Iran will gain nothing by departing from the terms of its nuclear agreement, the French foreign ministry said on Wednesday, responding to Tehran's announcement that it will boost the enrichment level of its uranium.

Iranian President Hassan Rouhani earlier said Iran would raise its uranium enrichment after July 7 to whatever levels it needs beyond the 3.67% purity cap set in the 2015 deal.

"Iran will gain nothing by leaving the Vienna accord," Foreign ministry spokeswoman Agnes von der Muhll told reporters in a daily briefing.

"Putting it (the deal) into question will only increase the already heightened tensions in the region."

Iran on Monday said that it had amassed more low-enriched uranium than permitted, its first major breach of the nuclear pact.

"That's why France with its European partners have asked strongly that Iran reverse the excess enrichment without delay and refrain from further measures that undermine its nuclear commitments," Von der Muhll said.