The Lady Shri Ram College student had launched a social media campaign against ABVP - the students' group linked to the BJP - in the aftermath of the February 22 violence at the Ramjas College over invitation to Umar Khalid, a JNU student charged with sedition.
But on Tuesday she pulled out of a protest march saying, "This is all I can take". Ms Kaur has alleged that she received rape and death threats.
The march drew huge crowds.
Ms Kaur was also trolled on Twitter for her video post on India-Pak peace and criticised by junior Home Minister Kirren Rijiju among others. He has drawn sharp reactions with his tweet on Gurmehar Kaur's Facebook post in which Ms Kaur held up a placard reading: "Pakistan didn't kill my father, war did". Her father, a soldier, was killed in 1999.
Yesterday, Mr Rijiju even re-tweeted a post by champion wrestler Yogeshwar Dutt, who appeared to mock Gurmehar Kaur's comment on Pakistan. She was earlier trolled for it by Virender Sehwag and Randeep Hooda.
Mr Sehwag later said that Ms Kaur "has a right to express her views and anyone who threatens her with violence or rape is the lowest form of life".
(With inputs from IANS)