"I have taken this decision to allow Sri Lanka Cricket to groom another youngster in my place," Dilshan, 36, said on Wednesday.
"I was to announce my retirement after the Zimbabwe Test series but unfortunately the tour was postponed."
Sri Lanka was to bout Zimbabwe from October and the bout beat included two Tests. The advancing opener fabricated his Test admission in 1999 adjoin Zimbabwe at Bulawayo and denticulate 163 in his additional match. In a Test career spanning 14 years, Dilshan played 87 Tests and denticulate 5492 runs at an boilerplate of 40.98.
His 16 Test centuries included a career-best 193 adjoin England at Lord's in 2011 as captain.
Dilshan, however, will abide to play in the beneath formats for his country.
"I will altercate my approaching with the civic selectors and if they charge me I will play till the 2015 World Cup," Dilshan said.
Dilshan's endure Test actualization was adjoin Bangladesh in March in Colombo, area he denticulate 0 and 57.
