Speaking ahead of Bayern's Bundesliga trip to Borussia Monchengladbach on Saturday, Kompany said he wanted Karl to embrace the experience of playing for the German champions without burdening himself with pressure.
"As a young player, you don't have pressure," Kompany said. "I want Lennart to feel that too. He has to enjoy what he's doing. If he makes mistakes, we'll discuss it. Hopefully, at some point, the pressure will be on his shoulders. But for now, he should enjoy these moments without any pressure."
The 17-year-old midfielder, who has impressed since being promoted from Bayern's academy earlier this season, is regarded as one of the club's brightest prospects.
Karl made his Bundesliga debut in September and has featured in both domestic and Champions League matches under Kompany.
Asked whether Karl could make Germany's squad for the 2026 FIFA World Cup, Kompany said his main priority was helping the youngster succeed with Bayern before thinking about international honours.
"I have great respect for Julian Nagelsmann," Kompany said. "My focus as Bayern coach is for Lennart Karl to be a success for Bayern Munich. He has to keep working and show that he has the qualities. Playing for Bayern can always be an advantage, but the focus has to be here, you can't think too far ahead."
Bayern, who are on a 12-match winning streak in all competitions, travel to Borussia-Park as league leaders looking to extend their advantage at the top of the table.
Bayern Munich have made a blistering start to the 2025/2026 season under head coach Vincent Kompany, whose side have rewritten European football history with a remarkable 16-game winning streak.
Germany coach Julian Nagelsmann has urged Bayern Munich's 17-year-old talent Lennart Karl to focus on development with the under-21 side before thinking about a senior national team call-up.
Bayern Munich's teenage winger Wisdom Mike has played down the growing media attention surrounding his rapid rise, insisting he is focused purely on improving his game and earning his place at the club.
VfL Wolfsburg have sacked head coach Paul Simonis after a woeful spell of six defeats in their last seven Bundesliga matches, leaving the club in 14th place and just one point above the relegation playoff spot.
