Warner was suspended until the start of the Ashes by Cricket Australia on Thursday and fined USD 11,000.
That means he will miss Monday’s match, where Australia need to overcome the unique challenge posed by slingshot seamer Malinga, renowned for his yorkers, if they are to reach the last four.
Their chances will in part be dependent on the outcome of Sunday’s Group A match between England and New Zealand in Cardiff.
If New Zealand win, Australia face a straight quarter-final with Sri Lanka but if England triumph, they must beat Sri Lanka by a sufficiently large margin to surpass New Zealand’s net run-rate, currently the best in the group.
Australia do at least have some recent experience of facing Malinga, having played 10 One-Day Internationals (ODI) against Sri Lanka during the past 18 months.
“Malinga is a phenomenon. He’s the best death bowler in the world without a doubt at the moment,” Arthur said on Saturday.
“We’re very fortunate to have played Sri Lanka a lot over the last 15 months. We’ve had two ODI series against them. All our players have faced quite a bit of Malinga and we’ll have our plans, come the game.