OTTAWA — Former foreign affairs minister Marc Garneau says Canada has lost its standing in the world under the tenure of Prime Minister Justin Trudeau, whom he criticizes as an ill-prepared leader who prioritizes politics and makes big pronouncements without any follow-through.

“I believe Justin Trudeau has overestimated Canada’s impact abroad,” Garneau writes in his autobiography, “A Most Extraordinary Ride: Space, Politics and the Pursuit of a Canadian Dream,” which is scheduled to be released in October by Penguin Random House.