Bauza earned an improved two-year deal the following season, as Swansea finished as League One champions.
Bauza follows Marcos Painter out of the Liberty Stadium, while youngsters James Burgin, Daniel Sheehan and Kieran Howard have also been released.
Manager Paulo Sousa is in the process of trimming his squad for next season's Championship campaign, having just missed out on the play-offs this term.
Bauza must surely be an untapped gem that will develop well under Sousa
DragonPhilljack
"As a manager you always have tough decisions to make,'' Sousa told the Swansea City website.
"Bussy [Bauza] has played an important part in the club's recent rise and I'm sure everyone would like to thank him for his efforts."
Ankle and knee injuries limited Bauza to just three league starts this season and three from the bench, plus a further substitute appearance in the League Cup.
Source: BBC Sport
Source: BBC Sport