Aniplus Asia has announced simulcast details for the second cour of Attack on Titan Season 3, which will continue in the Spring 2019 anime season. The first cour aired during the Summer 2018 anime season.
Attack on Titan Season 3 Part 2 is scheduled to continue simulcasting on April 29 at 18:00 GMT+8, with new episodes released every Monday at 18:00 GMT+8. WIT Studio will be animating the series.
Aniplus Asia describes Attack on Titan Season 3 Part 2 as:
“Attack on Titan Returns”
Returning season of the colossal hit series. The squad is ready to take back Wall Maria.
Aniplus Asia currently broadcasts its anime series via cable channel in Singapore, Malaysia, Indonesia, Philippines, and Thailand, while streaming in Singapore only.
Source: email correspondence