The 21-year-old has been at Blues since 2011, when he joined as an Academy scholar.
The left-back won his first pro-contract in 2012 and later signed a new one-year deal with a further one-year option in May 2013.
During his time with Blues he made just a solitary first team appearance. That came in a Championship fixture against Leicester City at St. Andrew's in January 2014.
However, he also spent several spells out on loan at lower league clubs; including Nuneaton Town, Swindon Town, Mansfield Town, Kidderminster Harriers and most recently Gillingham at the end of last season.
Blued decided not to take up the year's option on his present deal and we wish Amari'i every success in his future footballing career.