Iran's foreign minister says his country doesn't expect to cement a final deal in the coming round of nuclear talks with world powers.

Mohammad Javad Zarif spoke to reporters Sunday after meeting his Belarusian counterpart, Vladimir Makei, who is visiting Tehran.

"We don't expect to reach a deal in this round of talks ... We have agreed to discuss a number of issues in this round," Zarif said.

Zarif said Tehran and world powers will discuss "dimensions" of Iran's nuclear activities like uranium enrichment, a heavy water reactor as well as sanctions in the Tuesday and Wednesday talks in Vienna.

Iran capped uranium enrichment after a deal in November, in return for easing sanctions by the West.

The West suspects Iran's nuclear program has military dimension, a charge Tehran denies.