Answer

In the Navasmaran of Achalgacch, the third smaran is traditionally known as:

Ajit Shanti Smaran

Explanation

Navasmaran means “nine sacred remembrances.” In the Achalgacch tradition, these smarans are recited with devotion for spiritual purification, protection, and strengthening right faith.

The third smaran, Ajit Shanti Smaran, is connected with reverence toward Bhagwan Ajitnath and Bhagwan Shantinath, who are among the 24 Tirthankars.

Takeaway

The third smaran of Achalgacch Navasmaran is Ajit Shanti Smaran.