The traders, most of whom were from Assam and travelling to conduct business near the village of Gasuapara, were waylaid at about 6.30 AM, a police official said.
Eight traders managed to escape from the captors, he said.
The three traders who were taken at gun point by unknown militants, are all from Dalu in West Garo Hills district and have been identified as Tamal Dey (38) of Killapara, Dulan Mahanta (36) also of Killapara and Durgapada Dutta (35) of Chaipani.
Incidentally, its was the local MLA who informed the police that some traders might have been kidnapped after some vehicles were waylaid by armed men.
Eleven traders of Assam were kidnapped by militants from near the same spot about three months ago.