Suman was born in Bhedihari (part of Kalikamai Rural Municipality), a village in the Parsa District of southern Nepal to a Bhojpuri family.

[9][10] Shortly after graduating, Suman made her television debut with minor roles in Casualty and Ackley Bridge.

[11][12][13] She had a major guest role in the Doctor Who series 11 episode "Demons of the Punjab" as a young version of companion Yasmin Khan's grandmother, Umbreen.

[14] Suman took over the recurring role of Naya from Medalion Rahimi in season 2 of the CW series The Outpost.

[18][19][20][21] Suman has upcoming roles in the Paramount+ series NCIS: Tony & Ziva as Claudette and the Netflix political thriller The Choice.