The WTO said the volume of traded goods would expand by 2.5 per cent this year and by 4.5 per cent next year, down from the previous estimates of 3.7 per cent and 5.6 per cent, respectively.
"In an increasingly interdependent world, economic shocks in one region can quickly spread to others," WTO Director General PascalLamy said.
He added that the European Union's measures to stabilise the euro and US steps to support growth were therefore very welcome.
Much of the revision was due to falling demand for foreign goods in the EU, which accounts for 60 per cent of imports to developed countries.
This downward trend, along with softening demand from China, has hurt trade in developing countries, especially in Asia, the WTO said.//DPA