Australian resources and agricultural businesses will get more access into Iran after the Coalition said it plans to reopen a trade office there later this year after meetings with Iranian Foreign Minister Javad Zarif in Canberra on Tuesday.

However, signalling the government is yet to seal a deal over Iranian asylum seekers who have not been accepted as refugees in Australia, Dr Zarif said Iran would not force its citizens to return home.

The trade office, which closed in 2010, will be within the Australian Embassy in Tehran and help boost export and investment opportunities for business.

Foreign Minister Javad Zarif said he would not be forcing Iranians who were not accepted as refugees in Australia to return home. Andrew Meares

"Austrade will provide support to Australian businesses immediately from its office in Dubai, and will establish a permanent presence within the Australian Embassy in Tehran from the second half of 2016," a spokesman for Trade Minister Steven Ciobo said.

Mr Ciobo said trade was about $350 million a year under sanctions, and would only rise after the January nuclear deal.