Economic growth in the 17 countries that use the euro has sagged to a lacklustre quarterly rate of 0.2% in the second quarter as a previously robust expansion in Germany almost ground to a halt.
The official figures from the European Union statistics agency are more downbeat news for the global economy following disappointing second-quarter growth figures from the United States.
The eurozone's growth rate was well short of the 0.8% recorded in the first quarter, and was largely due to an abrupt slowdown in Germany.
The German economy, which is Europe's largest and makes up 27% of eurozone output, expanded only 0.1% in the quarter, as against 1.3% in the first three months of the year.
Germany's economy has helped support the eurozone through the government debt crisis. Its world-renowned companies have tapped export markets around the world, particularly in faster-growing emerging countries.
However, its growth in the second-quarter was hit by faltering construction investment and a sharp drop in energy production after the government shut down eight nuclear plants after the Fukushima reactor disaster in Japan.
Top German corporate executives have cautioned that growth could be less impressive in the second half of the year due to volatile raw material prices and the turmoil wrought by heavy levels of government debt in Europe and the US.
The economy for the broader, 27-member European Union grew 0.2% from the previous quarter. Both the eurozone and the European Union were up 1.7% compared to the same quarter a year ago.
Fears about excessive levels of government debt in the United States and Europe and a possible global slowdown have been weighing on markets.
The US figure of 0.3% quarter-on-quarter - 1.3% on an annualised basis - was a disappointment, and was followed by the additional shock of a downgrade to the US's credit rating.
Overall, the figures raise concerns that the eurozone economy - the world's second largest after the United States - is headed for more of a slowdown than expected.
"The weak data for Germany follow recent numbers showing zero growth in France in the second quarter, and raises concerns that the euro area's hitherto strong core countries are undergoing a much deeper than previously thought soft patch," said Chris Williamson, chief economist at financial information company Markit.
It's not just Europe that has slowed down. The US economy is growing at a far slower rate than previously thought while figures released yesterday showed Japan contracted further in the second quarter in the wake of March's devastating earthquake and tsunami.
Eurozone leaders are trying to contain a debt crisis in which rising interest rates threaten to make it impossible for countries to roll over their debt loads.
Greece, Ireland and Portugal have all needed bailouts and market turmoil has threatened Italy and Spain as well, darkening market and business confidence about coming months.