In Jainism, "Parshyun" refers to a period of religious observance that may involve certain dietary restrictions, similar to Paryushana or other fasting periods. During such observances, Jains often avoid foods that involve fermentation or that are considered to contain more life forms (nigodas).

Idli is traditionally made from fermented rice and urad dal (black gram) batter. Since fermented foods are generally avoided during Jain fasting periods like Paryushana or Parshyun, consuming idli would not be permissible according to strict Jain dietary rules observed during these times.

Summary: No, you should not consume idli during Parshyun or similar Jain fasting/observance periods because it is a fermented food, which is traditionally avoided.