Luke 2:41-49 tells us that Jesus, at the age of 12, went to Jerusalem with his parents for the feast of the Passover. But after the feast, as they were returning home, Jesus remained behind without the knowledge of his parents. After three days of searching, they found him in the temple of Jerusalem.
Ephesians 5:23 - "For the husband is the head of the wife as Christ is the head of the church, his body, of which he is the Savior.
If Jesus, the head of the church was searched by Mary when he was lost for three days, then undoubtedly, Mary is also searching for those members of the church which is the body of Christ, who had gone astray and are still lost until now.