Vaswani's design depicts the classic pose of Mother Teresa looking affectionately at a child whom she holds in her arms.
Mother Teresa, the Albanian nun who spent most of her life in Kolkota helping the poor and downtrodden, will be declared a Saint by Pope Francis in Vatican on September 4.
"I was elated and thrilled to hear that my design has been chosen as the official logo by Vatican for the canonisation of Mother Teresa," the 44-year-old designer said.
"While designing the logo, I focused to keep it very simple because I was aware that it will be used across media, including print and digital, and social network around the world," said Vaswani.
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"My creative work was liked by the chief of the Missionaries of Charity (in Kolkata) and in Rome. It was approved for its international use," she said.
The date of canonisation of the Mother, founder of Missionaries of Charity and a Nobel laureate, was announced by Vatican in March, after a meeting of the "Ordinary Public Consistory", comprising the Pope, Cardinals and promoters of sainthood causes that concluded the sainthood process.