She was found guilty of embezzlement of public funds, one of the worse crime for a politician. She was condemned to ineligiblity to run for office but she filled an appeal.

https://www.npr.org/2025/03/31/g-s1-57262/france-marine-le-pen-embezzlement-verdict

She was found guilt which if I remember correctly prevented her from running in the municipal elections (which she wasn't planning to run for anyways) but she can still run for president. she also has to wear an electronic bracelet to track her, she said she would not run for president with it and has tried to appeal the decision, if the court finds she has to wear it, Jordan Bardella the new president of her party (RN) will most likely run in her place