Outgoing foreign minister Jean-Noel Barrot said on Friday that France was demanding the "immediate" and "unconditional" release of its three citizens held in Iran.
Barrot told France Inter radio he would not comment on his Iranian counterpart's comments regarding a possible deal to exchange citizens.
Iranian Foreign Minister Abbas Araghchi said Thursday that a deal to exchange French prisoners in Iran for an Iranian woman held in France was nearly complete.
The proposed swap involves Mahdieh Esfandiari, an Iranian woman arrested in France in February on charges of promoting terrorism through social media.
"We have carried out a great deal of activity, and I can now say that we have reached the point where the exchange of the French prisoners in Iran is now approaching its final stages," Araghchi said in a televised interview, without elaborating further.
Iran has repeatedly called for her release, arguing that she has been unjustly detained.
France has filed a case against Tehran at the International Court of Justice (ICJ) over the detention of the two French citizens, Cecile Kohler and Jacques Paris.
Kohler, 40, and Paris, in his 70s, were arrested on May 7, 2022 and charged with spying for Israel, Iran's arch-enemy. Their families have described their situation as increasingly desperate.
Kohler and Paris are among roughly 20 Europeans currently detained in Iran.
They include a Franco-German teenager who disappeared in the country on June 16 while on a Europe-to-Asia cycle trip during Iran's brief war with Israel, and was later revealed to have been detained.
