This was lower than the 0.7% forecast seen in a Reuters poll and the lowest since March 2016 when it also rose 0.6%.
The headline consumer price index rose 0.4% from a year earlier, lower than both September's figure and the poll forecast which were at 0.5%.
Core inflation is the Monetary Authority of Singapore's preferred price gauge for setting monetary policy. It excludes changes in the price of cars and accommodation, which are influenced more by government policies.
