All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
Shaykh Ibn ‘Uthaymeen said: "If a woman begins menstruating on the Day of ‘Arafah, she should complete her Hajj and do all the things that people do, but she should not perform Tawaaf until she has attained purity."
Allaah Knows best.