Since February it has fallen from 54.3 points.
The worsening outlook is underscored by inflation readings from Germany with previous estimates of 7.3 percent for March confirmed today.
The figures put inflation well beyond its highest level since reunification with comparisons to the situation following the start of the Iran-Iraq war which also produced a shock for energy prices.
Dr Georg Thiel, President of the Federal Statistical Office, said: “In addition to the COVID-19 pandemic, the Russian war against Ukraine now also has a marked impact on the rate of price increase in Germany, especially for heating oil, motor fuels and natural gas as well as some food products.”