The Aston Villa manager stated that the Colombian’s introduction was a positive for his side.
The relegation candidates were outclassed at Goodison Park by a dominant host, with the visitors finding themselves 3-0 down at the interval courtesy of strikes from Romelu Lukaku and Ross Barkley.
Garde, who replaced the dismissed Tim Sherwood in the Villa hotseat recently, opted to bring Sanchez off the bench at half time in place of Idrissa Gueye.
The substitute made the Birmingham-based outfit more competitive in the centre of the park, going toe-to-toe with the likes of Gareth Barry and James McCarthy.
The French manager praised Sanchez after a poor collective performance from the rest of his team.
"I think we missed a little bit of character, we were too light on the field," Garde told The Birmingham Mail.
"We didn't win enough challenges, enough duels - that was a key point of the game.
"We were better in the second half. A player like Carlos Sanchez has done quite well in this situation.
"The first half we didn't win any challenges and when you don't it's too difficult to win the game.”
The defeat leaves Villa rooted to the bottom of the Premier League table, with only five points amassed in the club’s first 13 games of the season.
Garde will hope to get his first win of his tenure in England next weekend as the Villa Park side host newly promoted Watford.