The Carmelite Sisters of Saint Teresa (CSST) is a religious institute of the Catholic Church for women.

[3] The Carmelite Sisters of Saint Teresa have their roots in the Third Order of Our Lady of Mount Carmel and St. Teresa, a tertiary congregation established in Kerala in the 19th century.

The congregation was founded in 1887 by Sister Teresa of St. Rose of Lima, a Carmelite Tertiary who was sent to Ernakulam by Archbishop Leonard Mellano of Verapoly.

[5] Over the years, the Carmelite Sisters of Saint Teresa[6] have expanded their presence in India and have established various educational institutions across the country.

Today, the congregation has more than 1,500 sisters and operates over 250 schools and other educational institutions in different parts of India.