Iran's foreign minister, Hossein Amir-Abdollahian, told his French counterpart that Tehran "will vigorously continue boosting its defense power."
The messages from Iranian diplomat in his phone conversations with European leaders come ahead of the country's planned talks with world power aiming at behavior a 2015 nuclear deal.
Iran's sovereign rights will be exercised "inattentive to America's unconstructive behavior," Abdollahian said.
Despite growing criticism from Western and regional states, the Islamic Republic has said that its controversial missile program is part of its "defense doctrine" and that it is unnegotiatiable.
The previous six rounds that involved indirect contacts between the Islamic Republic and the Biden administration were adjourned in June, when the seat of executive power in Tehran was being taken by hard-liner President Ebrahim Raisi.
The Iranian minister also sent similar messages to Germany's top diplomat, Heiko Maas.
