This would indicate otherwise:
On Friday, The SIU men's and women's basketball programs were both affected by COVID-19. Saluki men's head coach Bryan Mullins tested positive for the virus and is asymptomatic, according to an SIU s...
www.dailyregister.com
And of course even if it were true, those would be games Domask would have been healthy for, contra the JeffJ tweet.
And even if there were 5 cancellations, it's still not enough to make 10 games less than 30% of the original schedule. There would need to be 8 cancellations.