So... is Saiki Kusuo no Ψ-nan finished or not?
YES, it is finished.
Why?
The anime finished after the manga:
Anime finished: December 30, 2019
Manga finished: July 26, 2018
MangaUpdates contains information about the anime adaptation and indicates that it is complete.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
The mangas and the non-core contents are excluded by default, but you can enable them by clicking the buttons below:
Saiki Kusuo no Ψ-nan
The Disastrous Life of Saiki K.
Anime - Base
Release date: July 04, 2016
Saiki Kusuo no Ψ-nan 2
The Disastrous Life of Saiki K. 2
Anime - Sequel
Release date: January 17, 2018
Saiki Kusuo no Ψ-nan: Kanketsu-hen
The Disastrous Life of Saiki K. Final Arc
Anime - Sequel
Release date: December 28, 2018
Saiki Kusuo no Ψ-nan: Ψ-shidou-hen
The Disastrous Life of Saiki K.: Reawakened
Anime - Sequel
Release date: December 30, 2019
Synopsis
Saiki Kusuo no Ψ-nan follows Kusuo Saiki, a high school student born with extraordinary psychic abilities. While most would see these powers as a gift, Kusuo considers them a constant source of annoyance and inconvenience.
His greatest desire is to live a normal and peaceful life, free from the troubles his powers create. He attempts to hide his abilities from his classmates to avoid unwanted attention.
However, Kusuo's efforts to blend in are continuously thwarted by the eccentric and often ridiculous personalities that surround him. He finds himself constantly drawn into bizarre situations and forced to use his powers to navigate the chaos, making his quest for an ordinary life surprisingly difficult.