Morbidelli had knee surgery ahead of the Dutch TT last month after worsening a pre-existing injury he sustained in training earlier this year.
The Italian was excluded from the race in Assen and will be out at least until the Aragon GP in September.
SRT has confirmed that Yamaha test rider Crutchlow will represent him in the Austria doubles race and his home race at Silverstone in August – which will give the track a boost as it will host its first British MotoGP race since 2019.
“It’s great to be racing with Yamaha as the official test rider again this year and to be able to step in if necessary is good for everyone involved,” said Crutchlow.
“I’m looking forward to racing for Petronas Yamaha SRT in the three Grands Prix.
“Of course it’s not the best of circumstances and I wish Franco a good recovery, I hope he comes back strong after knee surgery.
“I’m sure he will because he has ridden fantastic over the past two years.
Cal Crutchlow, Yamaha Factory Racing
Photo by: Gold and Goose / Motorsport Images
“I think it’s difficult to set goals for these three races and it will be more about understanding the bike as I’ve only had a few riding days this year.
“The good thing will be that I can compare the bikes and collect a lot of data for Yamaha.
“It’s a bit like being thrown into the deep end because it’s a very competitive MotoGP class, but I’m really looking forward to it and it will be good to be on the grid again.”
Crutchlow retired from racing at the end of last season and took on a role at Yamaha as an official test driver.
The Brit made his MotoGP debut on Yamaha machines with the Tech3 team in 2011 and scored six podiums on the M1 between 2011 and 2013 before joining the Ducati factory team in 2014.
Crutchlow has ridden the latest M1 in various tests earlier this year, but will be riding the two-year-old ‘A-Spec’ bike for his three-race stint.
Crutchlow will not be the only returned racing driver in Austria, because Dani Pedrosa will drive a wildcard at the Styrian GP with KTM.