In Jainism there is no universal scriptural rule that forbids a person from doing pooja (puja) during periods. Jain philosophy does not teach ritual impurity as a doctrine. Doctrinally, a woman may perform spiritual practices like chant, meditation, and puja.

However, in practice, some local Jain communities or temples may have their own customs or guidelines about temple entry or participation in certain rites during menstruation. These are social or community traditions rather than canonical Jain teachings.

What you can do:

• If you plan to perform pooja or visit a temple during your period, check with the specific temple or local community guidelines.
• You can continue personal prayers, recitations, and meditation at home if that feels appropriate to you.

If you’d like, I can help look up a specific temple’s rule or a Jain scholarly reference on this topic.