Manchester United are known to be pursuing a deal for the England international defender, who has become one of the hottest properties around following his outstanding displays at the World Cup this summer.
However Puel says he is going nowhere and is looking forward to welcoming him back into the fold once his break is over.
"I am confident about the presence of Harry for this season. He is a very good player for us," Puel told Sky Sports News. "I was not surprised about his performance during this World Cup. We saw his progress during the second half of the season.
"It was not a surprise to see him perform well at this level in the international game.
"Of course for us he is a very good player - I wait for him with impatience because we need Harry and we need also Jamie (Vardy) because they are Leicester."
Puel has also said finding a suitable replacement would be impossible before the transfer window closes on August 9.
"If we lose a player just a few days before the beginning of the season without the ability to replace him... To change the scene before the start of the season is not possible," the Frenchman added.
"He (Maguire) can continue to perform with Leicester and improve and that is the important thing always with a young player."