Last year, the unemployment rate was 4.8 percent. In the most pessimistic scenario, the number of unemployed could swell to 113 million, or 22.3 million more than last year, the ILO said in a report on the crisis' fallout in Asia.

An estimated 51 million new jobs will be needed this year and next to absorb Asia's growing labor force, with most jobs needed in the region's giant economies 20.3 million in India, 10.9 million in China and 3.6 million in Indonesia. Countries with the highest rates of expected labor force growth through 2010 include Pakistan at 6.1 percent, Cambodia at 4.9 percent, and the Philippines at 4.9 percent.

"There is very little chance that a sufficient number of new jobs will be created in the region this year to keep up with expected labor force growth," the report added. As fewer jobs are created at home, remittances from the region's army of migrant workers began to slow in the third quarter of 2008.

The Geneva-based ILO said the World Bank now forecasts an overall drop in remittances in 2009 partly due to the deep recession in the U.S., which accounts for 44 percent of workers' money sent to East Asia and the Pacific, and 28 percent to South Asia. "As global demand for workers contracts, the flow of migrant workers from developing Asia will moderate in 2009," the report said.

"For labor-sending countries, this will exacerbate the challenge of mitigating job losses and generating new employment domestically." Remittances comprise a third of gross domestic product in Tonga, 17 percent in Nepal, 11 percent in the Philippines, 9.7 percent in Bangladesh and 8.3 percent in Sri Lanka.

Declining production will also see a shift to informal, more vulnerable work that does not provide protection in case of job loss or illness, the report added. It said the number of vulnerable Asian workers, estimated at 1.08 billion in 2008, could rise this year by 21 million, and in an extreme case, by 61 million.

"The poor face a double crisis high costs for basic necessities on which they spend the majority of their income, along with economic stagnation that threaten their livelihoods," the ILO said. Promoting employment and supporting household purchasing power is critical for any stimulus package, as these will drive domestic consumption needed to quickly bolster growth, it added.