Marko says both Auer and Red Bull have mutually agreed to part ways, with the former’s age and lack of superlicense points cited as key reasons for the split.
"Lucas Auer is no longer in our squad,” Marko told Motorsport.com. “There are very simple reasons for this. Lucas came to Japan and it was a new team. They had their problems. But then he improved and had one or two podiums.
“Then the idea was: He is so far away from the 40 points that, together with his age, this would have been a too lengthy experiment for Formula 1.
“And on the other hand, in touring cars or DTM - I don't know if it's official yet where he'll be driving - he can do that and earn good money there. We are in mutual agreement.
“He's also trying to drive some Super GT races in Japan. He's going a different way. And once again, Motorsport isn't just Formula 1.
“If someone can practice his sport, his hobby at a high level and also earn money - far more than, well, not with Auer, because they have a successful transport company - but most of them earn much more than they could ever achieve in their civil profession.”