Leslie will be thrilled with his performance following a disappointing silver medal and time of 2:26.55 in this event at last year's IPC Swimming World Championships.
Paralympics New Zealand High Performance Director Malcom Humm said he was thrilled with Leslie's performance in the pool.
"Having finished second in this event at the World Championships last year, he has been determined to retain his number one world ranking and this has been evident in the way he has been training," he said.