Tuesday's row, which erupted on live television, is the latest chapter in the three-month-old Gulf crisis in which Saudi Arabia, the United Arab Emirates (UAE), Egypt and Bahrain are blockading Qatar.
Businessman said the national products are very competitive and of high quality that match worldwide standards.
Iran has been providing Qatar with food supplies amid the Saudi-led economic siege of the country.
"Personally I will not buy products from the boycott countries again", he said, pointing out that the products imported from Kuwait, Oman and Turkey are preferred due to their quality and competitive prices.
The four boycotting countries later demanded that Doha downgrade its ties with Iran even as Doha had already recalled its ambassador.
Arab foreign ministers meet in Cairo, Egypt, September 12, 2017.
The QIA is pressing ahead with plans to invest in the U.S.to show that the political crisis with Saudi Arabia and its allies hasn't impacted its ability to strike global deals, people with knowledge of the matter said in July.
"The severity of the diplomatic dispute between Gulf countries is unprecedented, which magnifies the uncertainty over the ultimate economic, fiscal and social impact on the GCC as a whole", said Steffen Dyck, Moody's vice president - senior credit officer and co-author of the report.
Qatar's Minister of State for Foreign Affairs Sultan Bin Saad Al-Muraikhi triggered the provocation by justifying his country's relations with Iran, saying it is a "decent country'".
The US has, so far, only offered verbal support to Kuwait's intervention between Qatar and Saudi Arabia.
He went on to say that the boycotting countries refused to actively interact with the efforts of Doha to settle the dispute and described Iran as an "honorable country", a description which received a severe backlash later on in the session.
"Congratulations to Iran and soon, God willing, you will regret it", he said.
Shoukry discussed Qatar's historic support for terrorism and funding terrorist groups, adding that Egypt has a 7000-year history and all its actions are responsible and based on facts.
Qatar denies the allegations and says the moves are politically motivated.
A day earlier, Saudi Arabia said it was breaking off any talks with Qatar, accusing the small Persian Gulf state of misreporting the content of a phone call between Qatari Emir Tamim bin Hamad and Saudi Crown Crown Prince Muhammad bin Salman.
Israel's neighbors in the Middle East continue to sling mud at one another in their quarrel over Qatar.
Besides Iran, Turkey has also been sending food aid to the Qatar, which heavily relies on imports to feed its 2.7 million population.