"The impact will be very noticeable in the months of March, April and May," Altmaier told the paper. "In the second half of the year, we still have the chance for recovery and catch-up effects."
But the outlook was clouded by uncertainty.
"The corona crisis is hitting the United States, one of our most important trading partners, much harder than previously assumed," he said, adding that Germany would need economic programmes after the crisis to stimulate growth.
"However, these will not be classic economic stimulus packages with a flash in the pan, but rather astute structural incentives for investment and innovation," said Altmaier, a member of Chancellor Angela Merkel's Christian Democrats (CDU).
(Writing by Paul Carrel; Editing by Chizu Nomiyama)