Niki Lauda is still not well enough to return to the F1 paddock.
The F1 legend had actually hoped to return to his duties as Mercedes team chairman in Australia, but he is still recovering from his 2018 lung transplant.
Team boss Toto Wolff said Lauda, 70, will also not be in Barcelona for the first European race of the season.
When asked about Lauda's return, he told Osterreich: "This is not yet an issue.
"I miss Niki and I hope he comes back as soon as possible."