The seasonally-adjusted production in all industries, which exclude the agriculture, livestock and fishery sector, sank 1.5 percent in October from a month earlier, according to Statistics Korea.
It marked the fastest decrease in 30 months since April 2020, continuing to slide with the falls of 0.2 percent in July, 0.1 percent in August and 0.4 percent in September, respectively.
Output in the mining and manufacturing industry tumbled 3.5 percent in October from a month earlier on the back of sluggish export.
The country's export declined 5.7 percent in October from a year earlier, marking the first reduction in 24 months.
For the first 20 days of November, the outbound shipment dwindled 16.7 percent compared to the same period of last year.
Production in the services industry retreated 0.8 percent in October on a monthly basis, marking the fastest decline in 22 months since December 2020.
The seasonally-adjusted retail sales index, which reflects private consumption, shrank 0.2 percent in October, keeping a downward trend for the second successive month.
Facility investment was unchanged in October compared to the previous month while completed construction gained 3.8 percent.
The cyclical variation factor for leading economic indicators, which gauge the outlook for future economic situations, fell 0.1 point over the month to 99.2 in October, continuing to decline for the fourth straight month.
The reading for coincident economic indicators which measure the current economic situation was unchanged at 102.4 last month.
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