Sharapova will be free to return to tennis on April 26, 2017, after CAS took nine months off an initial two-year suspension for a positive meldonium test.
And the former world No 1 can now look forward to challenging for a third French Open title and a sixth Grand Slam next spring.
She said: “I feel like something I love was taken away from me and it will feel really good to have it back. Tennis is my passion and I have missed it. I am counting the days until I can return to the court.”
Sharapova’s positive test came at this year’s Australian Open less than four weeks after meldonium was added to the World Anti-Doping Agency’s list of prohibited substances.
The Russian had been a long-term user of the drug and argued she was guilty of nothing more than an oversight.
Sharapova, a five-time Grand Slam singles champion, will now be free to chase a third French Open title at Roland Garros next spring.