Amazon is temporarily refusing to stock certain items in its warehouses, to cope with overwhelming demand for household essentials due to the coronavirus pandemic.
It means third-party sellers of non-essential items could find it difficult to ship orders to customers.
The move will last until 5 April and cover warehouses in the US and Europe.
Amazon told the BBC: "We are temporarily prioritising household staples, medical supplies, and other high-demand products coming into our fulfilment centres so we can more quickly receive, restock, and deliver these products to customers.
"We understand this is a change for our selling partners and appreciate their understanding."