South Korea's third-quarter gross domestic product grew by a revised, seasonally adjusted 0.8 percent from the previous quarter, confirming that Asia's fourth-largest economy slowed for the second straight quarter amid growing concerns over Europe's sovereign debt crisis and a global economic slowdown.

The revised growth is up slightly from the 0.7 percent estimate made in October by the Bank of Korea, but slower than the 0.9 percent quarter-to-quarter expansion in the second quarter and the 1.3 percent gain in the first quarter.

On a year-to-year basis, GDP grew 3.5 percent in the third quarter, also a tad higher than the bank's previous estimate of a 3.4 percent rise, according to revised BOK data released on Tuesday. The year-to-year growth is also higher than the 3.4 percent rise in the second quarter but lower than the 4.4 percent gain in the third quarter of 2010.