This week has been a tumultuous one for Shonen Jump, starting on August 8 when NHK first broke the news that Act-Age writer Tatsuya Matsuki had been arrested for allegedly sexually assaulting two junior high school girls. Jump was relatively quick to act and cancel the series—a decision that was made after consulting with 22-year old Act-Age artist Shiro Usazaki—and the final chapter made its debut in the latest Jump issue on August 11.
That final chapter will not, however, be making an appearance in English.
VIZ Media posted a notice on the Act-Age page, saying that "this week's chapter of Act-Age will not be published." The notice then went on to link to the English version of Shueisha's official statement on the matter.
In addition to not publishing the final chapter, VIZ Media removed listings of future compiled volumes along with the earlier notice about adding chapters 26-45 after their translation is complete. It's a shame the artist has to deal with this fallout, as well, but it looks like this is effectively the end of Act-Age in all respects.
In Japan, planned events are also being canceled, including the Act-Age stage play that was in the works for 2022.