You are an international student and you are interest in a program at ENS Paris-Saclay?
CAREFUL: a good level of French is necessary to follow courses taught in French. Following your level, admission process can differ.
Get some information directly from your home institution.
Apply through the competitive exam.
Apply with your academic file or through the competitive exam
If you are interested in pursuing a PhD at ENS Paris-Saclay, secretariat.ded [at] ens-paris-saclay.fr (please contact the Department)