The rocket was a ballistic missile capable of delivering a nuclear warhead, a team of sanctions monitors said in a confidential new report.
It will be the first time that Tehran attends an international summit on the four-year-long war.
Foreign ministers from Britain, China, France, Germany and Russia arrived Sunday to make a push to meet Tuesday's deadline for an Iranian nuclear agreement.
Part of the ongoing nuclear negotiations involve lifting the sanctions currently imposed on Iran.
Six countries in negotiations with Iran as U.N. nuclear watchdog says Tehran must address questions over explosives testing.
Iran's foreign minister on Thursday suggested that a 10-year freeze on some aspects of the country's nuclear program might be acceptable.
Secretary of State John Kerry will meet Iran's foreign minister and the European Union foreign policy chief in Oman on Nov. 9-10 to discuss the Iranian nuclear issue ahead of a looming deadline for a final agreement, the U.S. State Department said on Friday.