Brazilian beef could be in short supply over the next few weeks following delays in the approval process of farms fit for export.
Concerns about meat safety mean that from this month only approved Brazilian farms may export to the EU.
Brazil presented a list of some 2,600 farms that it said were export-ready, while the EU expected a list of about 300, leading to delays in approving the final list.
"Brazilian beef currently in transit will continue to arrive in the EU but obviously there may be some reduction in supply in the next few weeks if there is a delay in farm approvals," said Brazilian Beef Information Service director Rob Metcalfe.
Brazil hoped the number of approved farms would grow following the next EU inspectors' visit this month, he added.
The Farmers' Union of Wales applauded the temporary import ban on Brazilian beef, saying it was long overdue.