The 22-year-old is allegedly sidelined due to a thigh injury he sustained during practice.
However, rather than being a catastrophic injury, it is thought to be only a precaution.
Smith Rowe just made a comeback after being out since September of last year due to a groin issue.
He had to have surgery on his groin and was out for four months.
On January 9 of this year, he made his most recent appearance for Arsenal in a 3-0 FA Cup away triumph against Oxford United.
A completely healthy Smith Rowe would be a huge asset for Mikel Arteta's team, the head coach, earlier this month.
He continued by pointing out how versatile the 22-year-old star is for the team.