The selectors, who met here Sunday, made just two changes in the squad that played the fourth and the fifth one-day matches against England. Jadeja and Praveen replaced Harbhajan Singh, who is out with a hamstring injury, and batsman Virat Kohli.
Jadeja was member of India's World Cup-winning Under-19 squad and also in IPL champions Rajasthan Royals team last year. He made his case strong with his Ranji Trophy performances for Saurashtra this season.
Selectors also decided to go in with a five-prong pace attack and Irfan Pathan, whose selection ahead of R.P. Singh had caused a stir during the England series, managed to retain his place. Pathan along with Praveen, Zaheer Khan, Ishant Sharma and Munaf Patel will bolster the pace attack.
Sreesanth, who is fit again after a prolonged side-strain problem, failed to find a place.
With injury keeping Harbhajan out of action, left-arm spinner Pragyan Ojha was also lucky to retain his place. Had Harbhajan been fit, Ojha would have been replaced by Jadeja.
The trip to Sri Lanka, which begins Jan 28, comprises five ODIs and a Twenty20 international. The team arrives in Colombo Jan 26.
Squad: Mahendra Singh Dhoni (captain/wicketkeeper), Sachin Tendulkar, Virender Sehwag, Gautam Gambhir, Yuvraj Singh, Suresh Raina, Rohit Sharma, Yusuf Pathan, Zaheer Khan, Ishant Sharma, Munaf Patel, Ravindra Jadeja, Praveen Kumar, Irfan Pathan, Pragyan Ojha