Amazon Ireland said on Monday it would not accept loans from foreign lenders for the microloaning intermediaries Amazon and SBA Microloan, which offer financial products to small and medium-sized businesses in Ireland.
The announcement came amid a debate in the Irish Parliament over the impact of the Brexit vote on small business lending.
Earlier this week, the Government said it would restrict the ability of companies to use a loophole in EU law to use their own bank accounts for microlending and a new law was also under consideration to make it easier for Irish businesses to apply for loans.
However, in a statement on Monday, the Ireland Small Business Association (ISBA) said the decision would have a significant impact on Irish small and midsize businesses.
The ISBA said it will be looking at ways to encourage more microloanyers to apply.
It said it has received letters from Irish banks seeking more clarity over the rules.
The statement said the ISBA had urged the Government to reconsider the decision.
It called on the Government, the regulator and the banks to work together to ensure that any changes to the rules for the lending market are transparent and reasonable.
Irish businesses will be unable to borrow from the intermediaries for up to three months at a time.