Smith averaged 1.5 points in 7.6 minutes last season.
Aiken committed to Seton Hall, leaving the Terps with two open scholarships.
The Big Ten and NCAA tournaments were cancelled due to the coronavirus outbreak.
The Big 12, ACC, SEC and Pac-12, among others, have all also canceled their conference tournaments.
Ayala's late offensive rebound off a missed free throw helped the Terps seal their win over Michigan.
Guard Ashley Owusu led the way with 17 points, six rebounds and 11 assists.
Four different Terps scored at least 15 points.
The Terps look to get back in the win column and clinch a share of the Big Ten title on Senior Day
The Terps shot just 6-for-32 from three-point range.
Maryland is looking to bounce back from its first home loss of the season.