While the Blues have started the season very impressively, they did suffer a setback after a 1-0 defeat to Everton.
Havertz signed for £70 million and turned in his latest underwhelming display at Goodison Park.
He came off in the 68th minute, but his manager has full faith in the German.
"In the modern day there will be a criticism of every player at every club who loses a game or something didn't go right, a pass went astray," Lampard told reporters.
"He's a top quality talent, has come into this league and is playing on the right-wing. He can play in any position across the front and the right-wing countless times before he signed for Chelsea. He can play in midfield also.
"That's not an issue. He can do that. But we do have to be patient. Not just him, but any young player with the speed of the Premier League. I've got no problems with Kai.
"I said that last week and if people want to criticise him, jump straight down - just wait and give a young player time, whether it be a week, a month, six months or a year. I know the player he's going to be."