She was born in Taplejung district. She went to school in Jhapa District. She took a break from politics to pursue her doctorate following the successful 2006 revolution. She went on to achieve a PhD in Political Science from Tribhuvan University. Her PhD thesis on "political movement of women in Nepal" was titled translit=Nepalma Rajnitik Mahila Andolan: Vishleshanaatmak Adhyayan 2047-2060 BS. Bijay Subba, another prominent leader of the NCP, is her brother.
Political career
She has been actively involved in politics for the last 40 years. She has been politically active from Morang district. She joined active politics as a member of the CPN affiliated student union, ANNFSU. She was central deputy chair of ANNFSU at the time she graduated from student politics in 2052 BS. She registered as a member of CPN in 2047 BS and was elected to the central committee of CPN by the ninth general convention in 2071 BS. She also briefly served as the Morang district incharge of the party, before its merger with CPN-Maoist Centre in 2018. She was nominated as the ambassador of Nepal to Israel by the cabinet of KP Sharma Oli in 2016, but the government was dissolved before her nomination could be confirmed. She is considered to be a close ally of prime minister KP Sharma Oli, in addition to being particularly close to president Bidhya Devi Bhandari. She was elected to the federal parliament under the proportional representation system, nominated by the Communist Party of Nepal , and elected as deputy speaker with the support of her party CPN, as well as the Communist Party of Nepal of the left alliance, defeating Pushpa Bhusal of Nepali Congress, on 15 March 2018 by a margin of 143 votes. Her election as deputy speaker was controversial due to the fact that the constitution prohibits having both speaker and deputy speaker from the same party, which has been the case since the merger of CPN and CPN to form the NCP. Following her election as deputy speaker, she resigned as a member of her party as per the constitutional requirement. She was 53 years old when elected deputy speaker. She resigned as the deputy speaker on 20 January 2020, and on 17 February 2020 was appointed as the Minister for Law, Justice and Parliamentary Affairs. She is the younger sister of NCP leader Bijay Subba, who is also a central committee member of the party and a member of the House of Representatives through proportional representation system. Subba is said to have been inspired to pursue his own doctorate from the example of Tumbahamphe. While Subba had once defected from the party and started his own party, Tumbahamphe has been a life-long member of the CPN. Tumbahamphe famously challenged Bhim Acharya to a trainer dual once, after Acharya reportedly suggested a need to bring in trainers from the capital to educate party cadres in her district. She supports increasing government expenditure on public education.
Personal life
Tumbahamphe was married to Late Ghanendra Jimi, who was once elected chairperson of UrlabariVDC representing CPN.
