The businessman, Janking Marak, of Lower Gasuapara village was rescued from the zero line of the international border in Gasuapara, over 150 km from here, BSF spokesperson M Singh said here.
Marak was left behind when the border guards challenged four militants who fled, Singh said.
The businessman, who had received a demand note from the Garo National Liberation Army militants, was abducted on Sunday night from his home.
He was taken to the district hospital for a medical check up after rescue and was handed over to his family.
Last week, the militants shot dead two BSF men in the district after they foiled an infiltration bid. A huge quantity of arms and ammunition were seized.
