Germany's economy shrank slightly in the third quarter, data showed on Monday, as Europe's largest economy continues to be weighed down by weak purchasing power and higher interest rates. Gross domestic product fell by 0.1% quarter on quarter in adjusted terms, the federal statistics office said. "These data alone underline that the German economy has at least become one of the growth laggards of the euro zone," said Carsten Brzeski, global head of macro at ING.