The upcoming Japanese theatrical premiere of the film Fate/Grand Order Divine Realm of the Round Table: Camelot Wandering; Agateram has been postponed due to the coronavirus, the film was supposed to be released on August 15, 2020.
https://anime.fate-go.jp/ep6-movie/
The update on the new premiere date will be announce soon on the official website.
Source: FGO Movie Official Japanese Twitter
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