Severe fragmentation of the global economy could reduce global economic output by up to 7 percent.
This was determined by the International Monetary Fund in a report published late Sunday evening.
In some countries, gross domestic product could shrink by 8 to 12 percent, the report said.
Even with limited fragmentation, global GDP could shrink by 0.2 percent.
Global flows of goods and capital have leveled off since the 2008-2009 international financial crisis and trade restrictions have increased.
"The coronavirus pandemic and Russia's invasion of Ukraine have continued to test international relations and heightened skepticism about the benefits of globalization," the report said.
The breaking up of trade ties after decades of economic integration will have a particularly negative impact on low-income countries and less affluent consumers in advanced economies.