Sarabjit Kaur reportedly went missing during his visits to gurdwaras in Nankana Sahib.
According to reports, the local mosque where she got married has issued a nikah certificate citing her consent.
Kaur, 52, a resident of Kapurthala, had crossed the Wagah-Attari border on November 4 along with nearly 1,992 Sikh pilgrims travelling under the bilateral shrine-visitation agreement, The Tribune reported.
The group returned to India on November 13 after a 10-day visit.
Kaur did not accompany the team.
A purported viral Urdu nikahnama states that she married Nasir Hussain, a resident of Sheikhupura, around 56 km from Lahore, after converting to Islam, reported The Tribune.
In India, she was living in the home of her husband Karnail Singh in Amanipur.
Singh has been based in England for the past three decades.
She is reportedly divorced and has two children from her previous marriage.
Kapurthala police confirmed that Kaur has three past criminal cases registered against her—two in Kapurthala City and one at Kot Fatta in Bathinda—primarily related to cheating and fraud, the Indian newspaper reported.