The talks are set to take place in Geneva, according to the sources.
The planned talks between Iran, the three European nations and the EU, which is acting as a mediator, will be the country's first nuclear talks since President Masoud Pezeshkian took office in late July to succeed Ebrahim Raisi, who died in a helicopter crash in May.
At the talks, Iran's nuclear program and the European nations' sanctions on Iranian airlines and shipping companies are expected to be discussed, according to the sources.
Iranian Deputy Foreign Minister Majid Takht Ravanchi, a veteran nuclear negotiator of Iran, will reportedly lead the country's team in Geneva.
With the 2015 nuclear deal struck with six major powers -Britain, China, France, Germany, Russia and the United States- Iran agreed to curb its nuclear activities in exchange for the lifting of economic sanctions.
China and Russia, which are strengthening their ties with Iran, and the United States, currently undergoing an administration transition from President Joe Biden to Donald Trump, will not participate in the talks, the sources said.