Asian equity markets retreated on Tuesday following a negative lead from Wall Street and caution over when the Federal Reserve might reduce its stimulus program.

Pessimistic comments from activist investor Carl Icahn weighed on U.S. shares overnight after he said that he is "very cautious" on equities. Speaking at a Reuters investment summit, Icahn said he could see a big drop in markets because earnings at many companies are fueled by low borrowing costs rather than management strength.