The preliminary figures show that operating profit will be 6.1tn won ($5.1bn; £3.5bn) for the October to December period, from 5.29tn won a year earlier.
Analysts had expected the amount to be 6.6tn won, fuelling growth concerns.
Samsung products have been hit by weak demand in China and currency woes.
Operating profit fell 7.5% from the previous quarter.
