"Donald will join the team in their residential training at the Pallekele International Stadium where they will be undergoing a high-intensity training and conditioning programme from May 9-16," it said.
The South African, who is due to take up a coaching assignment with English county Kent next year, is due in Colombo on Monday.
Kent said Donald would join them in 2018 because of delays in obtaining a work permit.
Last week Sri Lanka named a 15-member squad led by Angelo Mathews for the Champions Trophy.
Sri Lanka Cricket said it hoped Donald would also train Sri Lankan pace bowling coaches Chaminda Vaas, Champaka Ramanayake, Ravindra Pushpakumara and Nuwan Zoysa.