The EBRD reduced the region's growth estimates to 2.1% from 3% for this year, even lower than the 2.4% forecast for 2022.
"Also, there is still uncertainty associated with the war in Ukraine, particularly for countries that are in geographic proximity," EBRD chief economist Beata Javorcik told Reuters.
Growth for Turkey, the single biggest recipient of EBRD funds, has been revised down to 3% from 3.5% for 2023, without considering the impact of the earthquake in the estimates.
The EBRD estimates Ukraine's economy to grow 1% this year after a 30% contraction in 2022.
"Unless there is a significant strategic change on the ground, growth in Ukraine's GDP in 2024 is likely to be sluggish, but positive at least," EBRD said.