In round 10 of the 2019 NRL season, Walker played his first game of the season and scored a try in his first game back since being stood down from the NRL. Walker made a total of 17 appearances for Manly in 2019 as the club finished 6th on the table and qualified for the finals. Walker played in both finals matches as the club reached the elimination semi-final against South Sydney in which Manly were defeated by his old club 34-26 at ANZ Stadium. On 6 December 2018, Walker was arrested by police after allegedly assaulting his fiancée Alexandra Ivkovic that day at their home on Sydney’s northern beaches. He was charged with domestic-related common assault and assault occasioning actual bodily harm. The altercation was triggered by Ivanovo preparing dinner early and asking Walker whether he would prefer to use a fork or a spoon, while he wanted to continue playing his PlayStation. At a pre-trial court hearing on 26 February 2019 it was revealed that in two video statements and multiple written statements to police, Ivkovic had said that Walker pulled her to the ground by her ponytail, while she was holding their four month-old son in her arms, causing her to sustain several bloodied minor cuts. These statements were supported by the only witness, her neighbour. However, at the hearing, Ivkovic told the court that she believed Walker did not pull, but “touched my hair”, at which point she over-balanced and fell. The NRL applied its new no-fault stand down policy, so Walker was suspended indefinitely. On 10 May 2019, at the court hearing, the magistrate dismissed the charges, saying she was not satisfied beyond a reasonable doubt that Walker had assaulted his partner. The NRL stated immediately that its no fault stand down had expired and therefore Walker became free to resume playing for Manly.