Nafl I’tikaaf while in menses

can a woman sit for nafil aetikaaf during her menses or is wudhu and purity an essential requirement?

Wa Alaikum As Salaam,
Purification from major ritual impurities is essential for nafl Itikaf. Wudhu is not essential. As such, you can sit for nafl Itikaf in the area of your house which you have fixed for salaah. When you are in your menses, you must come out from this area (since itikaf is not valid when a woman is in her menses). After your menses, you can go back into your nafl Itikaf.
And Allah knows best
Mufti Waseem Khan