The negative growth figure was revised down by the federal statistics agency from an initial estimate of zero percent.
Germany fell into a recession around the turn of the year, official figures published Thursday showed, as Europe's largest economy contracted by 0.3 percent over the first three months of 2023.
The recession was less severe than some early predictions made at the start of the conflict, but mild winter weather and the easing of supply chain problems following the Covid pandemic were "not enough to get the economy out of the recessionary danger zone", said Carsten Brzeski, head of macro at the ING bank.
The negative revision to the growth figure was no surprise following a string of weak economic indicators, LBBW bank analyst Jens-Oliver Niklasch said.
"The early indicators suggest that things will continue to be similarly weak in the second quarter" of 2023, Niklasch said.
Germany's last recession came as the coronavirus pandemic swept through Europe at the start of 2020, prompting governments to effectively shut down large swathes of the economy.