Guatemala has withdrawn from the Venezuelan-led Petrocaribe oil alliance after the Central American nation failed to negotiate favorable rates for purchases and financing, a vice-presidential spokesperson said.
Guatemala joined the 18-member group in May, seeking an interest rate of below 2 percent on its deferred purchases of Venezuelan oil.
"We did not get the benefits that the country hoped for," spokeswoman Karen Cardona told Reuters.
Venezuela's late president Hugo Chavez founded Petrocaribe in 2005 as an alliance that allows its member states to buy oil from Venezuela at favorable rates and with easy payment plans.
Venezuela, suffering from cash flow constraints and product shortages, has apparently been trying to make changes to the Petrocaribe financing arrangements.
Venezuelan foreign minister Elias Jaua said in Mexico that "we are advancing toward a new phase with Petrocaribe from an energy alliance to a productive energy alliance," without giving details.
Venezuela has for months suffered from nagging product shortages in part as a result of a lack of hard currency to import consumer goods.
Separately, Honduras, which rejoined the alliance in May, has been waiting since August for a fuel shipment from Venezuela that has been delayed due to "technical problems" in Venezuela's refineries, according to officials.