Singapore shares fell 1 percent to a one-month low, as concerns over slowing growth and renewed worries over the debt problems of struggling euro zone economies hurt risk appetite.
At midday, the benchmark Straits Times Index had dropped to 2,951.68, slightly above an intraday low of 2,949.90.
Data from China on Tuesday also suggested softening domestic demand after imports in March rose a smaller-than-expected 5.3 percent year-on-year.
Rising Spanish and Italian bond yields also added to nervousness.
"We are mainly in line with the region, and we are reacting to renewed concerns about the euro zone's debt woes. Spain and Italy are coming back into focus with debt yields rising again," said Jason Hughes, head of premium client management at IG Markets.
He added that a bailout for weaker euro zone economies such as Spain cannot be ruled out, as yields had risen to "worrying" levels again.
MSCI's broadest index of Asia Pacific shares outside Japan fell 0.8 percent to a 10-week low while Japan's Nikkei average dropped 1.5 percent to its lowest level in nearly two months.
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1306 (0506 GMT)
(Reporting by Charmian Kok in Singapore; firstname.lastname@example.org)