The exact reason depends on which match you mean, because Mbappé has missed different games recently for different health issues. Without knowing the specific team or competition you’re asking about “today,” only the general recent reasons can be given.

Recent Real Madrid matches

In early December 2025, Mbappé became a doubt for Real Madrid’s Champions League game against Manchester City after missing training with a muscular problem and having also suffered a broken finger in the previous league match. Reports described him as working separately or indoors rather than with the main group, which put his participation in question.

Earlier in June 2025, during the FIFA Club World Cup, he missed Real Madrid’s opener against Al Hilal because of a fever and illness that kept him out of training and even led to a brief hospitalization, and he was then handled cautiously against Pachuca as he recovered. Around the same tournament he also sat out a later group game against RB Salzburg due to acute gastroenteritis after falling ill just before the competition.

Recent France national team matches

For France, Mbappé was ruled out of an October 2025 World Cup qualifier against Iceland after taking a knock to his right ankle against Azerbaijan, with the French federation confirming he was released from the squad to return to Real Madrid and recover. In November 2025 he again left the France camp early because of right‑ankle inflammation, returning to Madrid for further checks and to avoid taking risks in a relatively low‑stakes qualifier.