If you're looking for anime similar to Sound! Euphonium Movie 3: Our Promise - A Brand New Day, you might like these titles.
The 10 members of the concert band club who failed Taki's audition form "Team Monaka" to support the club members participating in the Kyoto Concert Band competition. Even as they support the performers, they continue to hone their playing, and make monaka-shaped good-luck charms to hand out to their club mates before the competition. Although they didn't play in the competition, they still had things they had to do. But on the day of the competition, the members on their way to the concert hall receive a shocking message! This is Team Monaka's hot summer story.
Haruki Bandou was born into a family of Judo martial artists and expected to continue the family legacy. But he's about to trade Judo for…cheerleading?! When his childhood friend Kazuma Hashimoto invites him to join the BREAKERS, a male cheerleading club, Haru finds himself amongst a quirky group of boys. Can this squad of slightly odd and cute members make a breakthrough in college athletics?
The Saigo no Kotoba (Final Words) book follows Kawashima's life after her mother's death, and her pursuit of her singing dreams by performing free concerts on the streets of Tokyo's Shibuya district.
Gauche is a small-town musician with a passion for playing the cello, and is a dedicated member of the local orchestra. With an important performance in a matter of weeks, the group practices daily to hone their skills. But lately, Gauche's musical ability has been lacking, and to get it back, he must accept help from the unlikeliest of kin -- the furry and feathered friends who dwell on his land...
"If I don't have to do it, I won't. If I do have to do it, make it quick," is the basic principle by which energy conservationist Houtarou Oreki lives. But after his sister convinces him to join the Classics Club, Houtarou's life is turned upside down when he meets Chitanda, a perpetually-inquisitive girl who challenges the boy's easygoing existence. Intrigued by the slightest hint of a mystery afoot, Chitanda doesn't hesitate to pester the reluctant yet highly analytical Houtarou into satisfying her curiosity at every turn, no matter how small the problem. Alongside fellow members Satoshi and Ibara, the group tackles cases ranging from a self-locking classroom door, a strangely-popular library book, and even the shadowy history of the very club to which they belong!