Tehran has repeatedly demanded the release of about US$7 billion of its funds frozen in South Korean banks under US sanctions, saying Seoul was holding the money hostage.
"Our side expressed hope for the resolution of issues related to sanctions such as the transfer of frozen funds upon the agreement on the restoration of the Joint Comprehensive Plan of Action (JCPOA) now underway in Vienna," a South Korean statement said, using the full name of the nuclear accord.
The Iranian side stressed the importance of an early resolution of the matter of the frozen funds, it added.
Iran and South Korea are also discussing the trading of crude oil and oil products, on the condition sanctions are lifted as progress is made in nuclear negotiations, the statement said.
Previously South Korean oil buyers chiefly imported condensate, or an ultra-light form of crude oil, from Iran.
In Tehran, the Iranian Foreign Ministry spokesman Saeed Khatibzadeh said Iran saw the talks as a possible indicator of attempts to re-establish trade ties with South Korea.
"This expert meeting's results can be seen as a test of South Korea's seriousness to solve existing problems between the two countries and normalizing ties, including through oil and condensate sales to Korea and Korean firms' investments in Iranian projects," Khatibzadeh told state media.
"Therefore, Iran will carefully follow up on the results of these negotiations in considering how to regulate relations between the two countries," Khatibzadeh added.
The United States reimposed sanctions on Iran in 2018 after then President Donald Trump withdrew from the nuclear deal under which Tehran agreed to curb its nuclear program in exchange for US sanctions relief.
South Korea, the world's fifth-largest crude buyer, imported a total of 12.6 million tons of crude in January against 10.3 million tons a year ago, preliminary data from the Korea Customs Service showed.
