The Straits Times Index fell 16.53 points to 2,222.83.
Volume was 718 million shares valued at 638 million Singapore dollars (378 million US), down from 1.13 billion shares worth 1.12 billion dollars on Friday. Losers beat gainers 289 to 192, with 1,013 stocks unchanged.
"There's no follow-through buying. Most players are on the sidelines waiting for more third-quarter results. There will be public holidays next week so most players don't want to hold on to positions," a dealer from a local brokerage said.
The dealer expects the market would trade between 2,200 and 2,250 points for most of the week.
Financial markets here will be closed on November 1 and 3 for public holidays.
Among blue chips, Singapore Telecommunications extended its decline amid a lack of buying catalysts, falling three cents to 2.36.
Keppel Corp, which will report its quarterly results Tuesday, was down 10 cents at 11.70, while Singapore Airlines, which will release its second-quarter report on Thursday, dipped 10 cents to 11.40.
Singapore Press Holdings fell two cents to 4.48, while ST Engineering was steady at 2.46.
Banking stocks were lower, with DBS down 20 cents to 15.70, United Overseas Bank was off 20 cents at 13.60 and Oversea-Chinese Banking Corp finished five cents lower at 6.20.
Among technology stocks, Chartered Semiconductor rose four cents to 1.06 after it posted smaller losses in the third quarter and is predicted a return to profitability in the fourth quarter.
Venture Corp was down 20 cents at 13.00, STATS ChipPAC climbed 1.5 cents to 95.0 cents and Creative Technology added 10 cents to 12.70.
In the property sector, CapitaLand shed four cents to 3.08, City Developments dropped 10 cents to 8.50 and Keppel Land declined four cents to 3.80.