The data is “another warning that the euro zone economy is sinking further into recession,” Jonathan Loynes, chief European economist at Capital Economics, wrote in an analysis, adding that the results dashed hopes that the European Central Bank’s pledge on Sept. 6 “to take more decisive policy action might have improved sentiment towards the broader economy.”

Mr. Loynes said the confidence results were consistent with an annual contraction in the euro zone economy of about 2.5 percent.

Figures from the core euro zone economies were mixed.

In Germany, the Federal Labor Agency said the number of unemployed rose for the sixth consecutive month. Although the seasonally adjusted unemployment rate held steady at 6.8 percent in September, there were 9,000 more people out of work than in August.

As a result of structural changes in the early 2000s, the German labor market has remained resilient during the crisis in much of Europe. But the Labor Agency predicted the German job market would cool in the rest of 2012 as growth slowed and the impact of the euro zone crisis began to take a toll.

Germany’s labor market has been one of the main drivers of its growth this year, Carsten Brzeski, an economist with ING in Brussels, wrote, and the data Thursday suggests that the slowdown of recent months “seems to have come to at least a temporary halt.” Nonetheless, he added, hiring is losing momentum and manufacturers will probably begin to shed jobs soon. He estimated that the German unemployment rate would return to 7 percent by the end of 2012.