Bowen also revealed that he thought Nani was a success at United. The Portuguese international did win four league titles and the Champions League during his time at Old Trafford.
The Stoke assistant manager also stated that Nani is currently in good form for his national team and that he thinks several Premier League sides could be keeping close tabs on him.
“He probably left the Premier League too early,” Bowen told BBC Radio Stoke.
“He’s still a real talent, as we’ve seen. He’s got the attributes any Premier League team, I would have thought, would be interested in, especially given the form he’s in at the moment.
“He had good times at Man United. He was a Champions League winner there.”
Bowen recently confirmed that Stoke are interested in Nani who currently has an €8.5 million release clause.
Stoke are expected to face competition from Valencia who are reported to be closest to currently signing the 29-year-old winger.
“I know there is an interest there. Valencia are a big club but it is the draw of the Premier League,” Mark Bowen told talkSPORT.
Nani will not make a decision on his future until after Euro 2016. Portugal take on Wales next in the semi-final and Nani is currently top goal scorer alongside Cristiano Ronaldo for his national team.
The experienced winger joined the Yellow Canaries on a three-year move from Manchester United last season.