In a meeting with OPEC Secretary General Mohammad Barkindo, a senior Iranian diplomat urged him to keep the group out of politics, reported Reuters.
"No country is allowed to take over the share of other members for production and exports of oil under any circumstance, and the OPEC ministerial conference has not issued any license for such actions," said Kazem Gharibabadi, the permanent envoy to Vienna-based international organizations.
In May, US President Donald Trump pulled out of an international nuclear deal with Iran and announced sanctions against the OPEC member.
Washington is pushing allies to cut imports of Iranian oil to zero and will impose a new round of sanctions on Iranian oil sales in November.
Iran is the third-largest oil producer in OPEC after Saudi Arabia and Iraq.
Trump has called on OPEC to pump more oil to bring down prices. Energy ministers of Saudi Arabia and Russia said in May they were prepared to ease output cuts to calm consumer worries about supply.
"Iran believes that OPEC should strongly support its members at this stage and stop the plots of countries trying to politicize this organization," Gharibabadi said.
Iran and other signatories of the nuclear deal, including Britain, France, Germany, Russia and China, have been working to find a way to salvage the agreement despite US pressures.
In August, Washington imposed sanctions on acquisition of US dollar banknotes by the government of Iran, Iran's trade in gold and precious metals, and its automotive sector.
On November 4, Washington will reimpose sanctions on Iran's oil exports and energy sectors, financial institutions conducting transactions with the Central Bank of Iran, as well as sanctions related to Iran's port operators and shipping sectors.