Norwich spent the 2019/20 season in the top-flight but finished rock bottom with just 21 points, 14 points behind 17th-placed Aston Villa.
Cantwell made 37 Premier League appearances that term, scoring six goals and laying on two assists.
Will Norwich avoid relegation next season?
Newsome thinks that Cantwell will be a stronger player as a result of the club’s setbacks and believes he has the tools to make more of an impact in the top-flight next term.
Speaking exclusively to This Is Futbol, when asked about the 23-year-old, Newsome revealed his hope that the entire club will be better for the experience of relegation, along with manager Daniel Farke.
He said: “You’re not only trying to work your way into a first-team and hold down a position, you’re also testing yourself at the highest level so Cantwell will be a far better player this time around because of all the experience that he’s been through.
“Just like the whole of the Norwich squad will be, just like Daniel Farke will be as well. It’ll not be that massive surprise to them now that maybe it was last time.”