In Jain dharma, diksha is meant to be lifelong (aajivan diksha). When someone takes monk/nun diksha, they promise in front of Jinendra Bhagwan and Guru to leave worldly life forever.

So, in principle according to shastra:

• A person who has taken full monk/nun diksha should not return to normal household life.
• It is considered a very big spiritual commitment, much stronger than any ordinary vow.

However, what if someone really cannot continue?

• Sometimes, in rare cases, a sadhu/sadhvi may break their vows and return to family life.
• Jain scriptures and acharyas see this as a serious fall (avasthā-chyuti).
• From that point, spiritually they are again treated as a shravak / shravika (lay person), not a monk or nun.
• They must do strong pratikraman, prayashchit (repentance) for breaking such a high vow.

Because of this:

• Good acharyas/gurus test and train a person for years before giving diksha,

• They check: vairagya (detachment), mental stability, family situation, health, etc.

So, in simple words:

• Diksha is not like “trying monastic life for some time.”
• It is taken with the clear intention never to return to normal worldly life.
• If someone does come back, dharma still accepts them as a lay follower, but spiritually it is seen as a major mistake and great loss of a rare opportunity.

If a person has doubts, fears, or is not fully ready, Jain dharma would say: Better to remain a sincere shravak/shravika than to take diksha and then leave it.