The report also said that former Zimbabwe batsman Grant Flower will be appointed as the batting coach, with David Saker and Shane McDermott joining as bowling coach and fielding coach respectively.
Flower, however, is expected to work only with Sri Lanka's white-ball teams, and will not travel to Pakistan for the two-match Test series later this month.
Arthur, who has also served as the head coach of South Africa and Australia, was last month released from his short-term T20 contract with New Zealand side Central Districts. The South African had been appointed in September to coach the Stags solely in this season's Super Smash T20 campaign starting December 13, but has requested a release from his contract which CDCA has granted.
Arthur and Flower were removed as head coach and batting coach of Pakistan following their dismal performance at the 2019 World Cup. In Arthur's place, former Pakistan skipper Misbah-ul-Haq was appointed as the head coach cum chief selector.