Rashmika Sewwandi, Dewmi Vihanga, Inoka Ranaweera were left out of the squad that played the series against Bangladesh earlier this month.
Gimhani, 17, is an ambidextrous wristspinner who has played seven T20 internationals, having made her debut as Sri Lanka’s youngest international at the age of 15.
The squad will depart for England on June 3.
Sri Lanka are in Group 2 along with England, New Zealand, West Indies, Ireland and Scotland. They play the opening game of the tournament against England at Edgbaston on June 12, followed by fixtures against New Zealand in Southampton (June 16), West Indies in Bristol (June 21), Ireland also in Bristol (June 23), and Scotland in Manchester (June 26).
The top two teams from Groups 1 and 2 qualify for the semi-finals at The Oval on June 30 and July 2. The final is on July 5 at Lord’s.
Sri Lanka squad for Women’s T20 World Cup
Chamari Athapaththu (capt), Hasini Perera, Vishmi Gunaratne, Harshitha Samarawickrama, Imesha Dulani, Nilakshika Silva, Kavisha Dilhari, Hansima Karunarathne, Kaushini Nuthyangana, Sugandika Dassanayaka, Nimasha Madushani, Shashini Gimhani, Kawya Kavindi, Malki Madara, Mithali Ayodhya
