By Andrey Ostroukh

MOSCOW--Russia's government will soon present a new economic forecast, which will be "very harsh", the Deputy Prime Minister said Friday.

A combination of sanctions and falling oil prices is expected to push Russia into a recession this year, and the full-year economic contraction may reach around 4%, according to the central bank, but so far forecasts from the government have been a bit more optimistic.

"A new economic forecast, which will be passed to the government by the economy ministry in two days, will be very harsh. We have no rosy expectations and illusions," Igor Shuvalov said.

Presenting the government's economic outlook in the lower house of parliament, Mr. Shuvalov said the number one priority is to sustain economic stability and avoid increasing the budget deficit.

Russia earlier this week announced a $34.6 billion spending plan, aimed at battling the economic damage of Western sanctions and a prolonged period of depressed oil prices.

The government said on Wednesday that the cost of its "anticrisis" plan would reach RUB2.34 trillion, up from a previous estimate of RUB1.4 trillion.

Write to Andrey Ostroukh at andrey.ostroukh@wsj.com