Deputy economy minister Alexei Vedev told Russian news agencies that preliminary estimates put the year-on-year drop in gross domestic product for the third quarter at 4.3 per cent, slowing to 3.8 per cent in September from 4.6 per cent in August.
Officials in Russia are struggling to breathe life into the economy as the ruble has dropped precipitously in value and inflation and poverty have risen sharply.
Russia's government estimates that the economy will shrink by some 3.9 per cent in 2015 before recovering slightly by 0.7 per cent in 2016.
The World Bank last month predicted the Russian economy would shrink by 3.8 per cent in 2015 in its baseline scenario, a far steeper drop than an earlier forecast of a 2.7-per cent contraction.
The downturn in 2015 could be as much as 4.3 per cent if oil prices continue to drop and average around USD 50 dollars a barrel for the year, the bank said.
The poverty rate has climbed to 15.1 per cent, representing 21.7 million people, in what the World Bank called a "troubling rise" exacerbated by increasing food prices.
In some regions, more than 35 per cent of the population live in poverty, it said.
The International Monetary Fund estimates that Western sanctions imposed on Moscow over its meddling in Ukraine could cost Russia some 9 per cent of GDP in the medium-term.
