Garden-Bachop passed away in Christchurch on Monday due to a "medical event," according to New Zealand Rugby.
His father, Stephen Bachop, represented both Samoa and New Zealand in rugby, while his mother, Sue Garden-Bachop, played for the New Zealand women's team, the Black Ferns.
He was also the nephew of Graeme Bachop, a scrum-half who played for the All Blacks in the 1991 and 1995 World Cups and for Japan in the 1999 tournament.
Garden-Bachop had been with the Highlanders for the past five years and left the team earlier this month after their Super Rugby campaign ended in the quarter-finals.
"All of rugby walks alongside the Garden-Bachop family at this time and we are collectively united in our grief," read the statement.
"Connor was a fantastic young player, an exciting New Zealand age-grade representative and a proud Maori All Black.
"Wherever he played, he was a committed and popular team-mate with infectious energy and someone who could light up the room."
Kei te tangi te ao Whutupōro kua hinga tētahi o ngā tama o te papa takaro.
The house of rugby laments the passing of one of its sons who graced the playing fields.
It is with great sadness that we acknowledge the passing of Connor Garden-Bachop yesterday. He will be