The World Bank on Monday slashed its 2012 growth forecast for developing countries in East Asia and the Pacific to 7.2 percent, dragged down by China's worst economic performance in 13 years.
The bank said China's economy would grow just 7.7 percent this year, down from 9.3 percent in 2011 and its slowest rate since 1999, but it added that stimulus measures would help push it back above the crucial 8.0 percent in 2013.
The projections, contained in a report called the East Asia and Pacific Data Monitor, were down from a May forecast of 7.6 percent growth in the region, and 8.2 percent in China, this year.
A similar forecast for China was issued by the Asian Development Bank last week.
The report comes as the World Bank and International Monetary Fund prepare to hold their annual meetings at the end of the week, while the Group of Seven advanced economies will also meet to discuss the global outlook.
Despite the World Bank's downgraded forecasts Bert Hofman, the bank's chief economist for East Asia and the Pacific, said: "Our main forecast is still that China will have a soft landing."
And he told journalists in Singapore that while there is a risk of a major slowdown, "we think it's small, not least because of the policy space that the authorities still have and the likelihood that they will indeed use it".
He added: "They have enough fiscal space, they still have some monetary space so they could revamp the economy... if and when needed."
Hofman also noted that China was being hit by a "double whammy" of an export slowdown and softer domestic demand.
In East Asia and the Pacific, GDP growth will be the slowest since 2001, even worse than the peak of the global financial crisis in 2009, Hofman said.
The bank however said regional gross domestic product (GDP) growth should rebound to 7.6 percent in 2013, driven by domestic demand, but it warned that a worsening of the eurozone debt crisis, problems in the United States and a further slowdown in China are major risks.
"In a fragile external environment, the economy in the East Asia and Pacific region continues to slow down," the bank said.
"Should conditions in Europe deteriorate sharply, no developing region would be spared," it added.
Hofman said that despite the slowdown, East Asia and the Pacific's growth rates are "still the envy of many in the developed world" and its share of the world economy has tripled in two decades to nearly 18 percent of global output.
The region covered by the new forecast comprises China, Indonesia, Malaysia, the Philippines, Thailand, Vietnam, Cambodia, Fiji, Laos, Mongolia, Myanmar, Papua New Guinea, the Solomon Islands and East Timor.
The European Central Bank's pledge to vigorously defend the euro and its pledge of a massive bond-buying programme have brought some calm to global markets in recent weeks, but the World Bank said Monday the situation could still worsen.
"With a 'major' crisis, GDP growth could drop by more than two percentage points in 2013," said the report.
Hofman said such a scenario would involve more than one member exiting the eurozone.
Violent protests have wracked debt-stricken Spain and Greece over austerity measures imposed by their governments.
Spain, the eurozone's fourth largest economy, has insisted it does not need a financial bailout, raising concerns in international markets over whether it can continue to function without an injection of funds.
In Greece, Prime Minister Antonis Samaras warned his country would run out of funds next month if no fresh financial infusion is upcoming, and his people could no longer accept further belt-tightening measures.