Canadian Gavin Schmitt led all scorers for the second successive evening — this time with 19 points — as Canada toppled the Cubans 26-24, 25-19 and 25-21.
Gordon Perrin added 12 points for the Canadians, who are atop the standings in Pool C.
"It's good to get two 3-0 wins because that's not what usually happens in the first leg of World League — usually you split because both teams are a little rusty," said Perrin. "But we escaped with two big wins and it's starting to come together."
Schmitt scored a game-high 17 points on Saturday en route to beating Cuba 25-20, 25-19 and 26-24 in the season opener.