Short answer: No, kasuri methi (dried fenugreek leaves) should not be eaten during Paryushan.

Reason in simple terms:

• During Paryushan, Jains traditionally avoid all green leafy vegetables (saag) – e.g. fresh methi, coriander, spinach, etc.
• Kasuri methi is nothing but dried methi leaves, so it is also counted as saag and comes under the same restriction.
• In these days, food is kept very simple: no roots, no leafy vegetables, no fermented items, no outside food, eaten only in daytime.

So even a small amount of kasuri methi used as masala in sabzi, dal, thepla, etc. is usually avoided to keep the maryadā and saiyam of Paryushan.

If your local sangh or guru has given a specific pachchakkhan (vow) about food for Paryushan, follow that strictly. You can read a simple guide on Paryushan food rules here: