The commission, the EU's executive arm, is now expecting growth of 1.3 per cent in the eurozone this year, a significant cut from 1.9 per cent predicted in November. It said the full European Union would grow by 1.5 per cent instead of the earlier 1.9 per cent.
The health of the German economy is fast emerging as a worry for the EU as slumping demand for foreign cars in China takes a toll on Europe's export powerhouse.
"The possibility of a disruptive Brexit creates additional uncertainty," he added.
Another problem is Italy, which the commission said would grow by a paltry 0.2 per cent this year, still better than a recession, but a huge cut from the 1.2 per cent forecast late last year.
Slower growth spells big trouble for populist-led Italy, where huge amounts of government money are swallowed up each year to help pay down about two trillion euros in public debt.
Rome's coalition government of the anti-establishment Five Star Movement (M5S) and the League party was already forced to water down its ambitious budget in December to avoid being punished by the EU Commission and financial markets.
Moscovici, a former French finance minister, warned that France was also caught in the cooldown, especially after a wave of "yellow jacket" protests hit the country in December. In France, the European executive now expects growth of 1.3 per cent in 2019, compared to 1.6 per cent in its autumn forecasts.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)