“I have decided together with the medical team of the club (Barcelona) that I will do a complementary intervention on my knee. I’m sad that I will miss the Euro 2020 this summer with Germany,” the 29-year-old said on Instagram.
Barca said in a statement that Ter Stegen is scheduled to go under the knife on May 20. It will follow a similar operation in August last year, which kept him out of action until November.
His announcement comes a day after Barca were officially left out of the running for the Spanish league title after a 2-1 home defeat by Celta Vigo left them seven points behind La Liga leaders Atletico Madrid with one game to play.
Ter Stegen has played just 24 times for his country as he has struggled to dislodge Bayern Munich stopper and Germany captain Manuel Neuer from the number one spot.
Euro 2020 will take place between June 11 and July 11 across Europe after being pushed back a year by the Covid-19 pandemic.
Germany are in Group F alongside world champions France, Euro 2016 winners Portugal and Hungary.