Zimbabwe, Namibia and Botswana have banned imports from South Africa.
Neighbouring countries have banned imports of poultry meat from South Africa following a bird flu outbreak.
Zimbabwe, Namibia and Botswana banned imports after the HN58 strain of the disease was found in two flocks in the Mpumalanga province.
About 260,000 birds were culled. Zimbabwe has also been affected by outbreaks.
South African agriculture, forestry and fisheries Minister Senzeni Zokwana said: “A number of trade partners have suspended trade of raw meat, eggs and live birds from South Africa.
“This is mainly because the South African veterinarians have to certify that the country is free of avian influenza, and since June 22, they could not provide this certification.
“However, processed meat is considered safe for trade and some countries still accept this,” he added.
It was believed the disease was spread by wild ducks which had migrated from Europe.
Mr Zokwana also emphasised the type of virus did not affect people.
“The meat that is on the shelves is safe to eat as it has gone through a process of meat inspection and certified fit for human consumption,” he added.
European poultry producers have also faced issues with authorities reporting a HN58 bird flu case in southern Belgium last week.
In its quarterly report, meat processor 2 Sisters also reported avian influenza had affected its export business in both Poland and the Netherlands contributing to its fall in profits.
In Britain, a 10km surveillance zone remained in place in Norfolk.
In China, there have been 21 confirmed human cases of the H7N9 strain of avian influenza in June, according to the World Health Organisation with one death.