Government says the move will support local processors while keeping controls on export volumes.
The extension gives local farmers more time to sell their harvest, but grain traders warn that slow collections could tighten supplies before imports return.
Government purchases have started to reduce stock levels, but industry leaders say stronger trade policies and better processing remain key to securing the future of Malian rice.
The United States wants to grow wheat sales in sub-Saharan Africa by showing buyers the value of higher quality wheat instead of competing on price.
The country continues to expand its list of wheat suppliers while efforts to raise local grain production continue.