With only two per cent of the needed USD 400 million raised, Guterres had written to all member-states last month to appeal for aid to Haiti, where more than 9,000 people died of cholera in a 2010 epidemic.
Britain was the only country to come forward, pledging USD 622,000.
That amount will be added to earlier contributions to the UN fund from South Korea, France, Liechtenstein, India and Chile -- totaling about USD 2 million.
The United Nations is hoping to raise USD 400 million over two years to reduce the current cholera caseload of 30,000 to 10,000 by the end of 2018 and provide clean water and sanitation.
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Only 25 per cent of Haitians have access to toilets.
In his letter, Guterres had asked member-states to come forward with pledges by March 6 and said that if not enough was raised, he would be looking for other solutions.
UN spokesman Stephane Dujarric said the search for funds to help Haiti continues.
Former UN secretary-general Ban Ki-moon was forced to apologise to the Haitian people after tests showed that cholera was introduced by infected Nepalese UN peacekeepers sent to Haiti after a devastating 2010 earthquake.
The United Nations insists it is not legally responsible for the damages and invokes diplomatic immunity from lawsuits linked to the cholera outbreak.