"Chaminda Vaas and Suraj Randiv will be included in the Sri Lankan squad for the World Cup final as cover for the injured (Muttiah) Muralitharan and (Angelo) Mathews," Sri Lanka Cricket said in a statement.
Vaas, 37 and Randiv, 26, were due to fly out to Mumbai later Thursday ahead of Saturday's title match against India.
Muralitharan, who turns 39 next month, has played through the six-week tournament despite suffering hamstring and groin injuries, a side strain and a troublesome knee.
But coach Trevor Bayliss insisted on Thursday that Muralitharan, who will retire after Saturday's final, will play against India.
"Chances are good that Murali will play," said Bayliss. "He completed 10 overs in the semi-final, and such is the character of the man that he will play even with discomfort.
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All-rounder Mathews, 23, picked up a right-side strain while fielding during Tuesday's semi-final win against New Zealand. Sri Lanka, 1996 winners and 2007 finalists, want to win the cup for legen