Usuthu earlier announced the PSL's record marksman with 121 goals will retire at the end of the campaign.
Nomvethe, who turns 41 in December, admits he never thought he would enjoy such a lengthy run in topflight football.
"Today is my big day and this is my last season to be playing football," he said sitting alongside his long-time agent Mike Makaab at a press conference at Moses Mabhida Stadium in Durban.
"I've enjoyed playing football and I never expected that I'll be playing 24 years in my career.
"Even though it is my last season I'll still give it my best. I've showed the youngsters. I've still got to be an example to all of them.
"I also want to thank my manager from Prosport International for years of great service."
AmaZulu general manager Lunga Sokhela thanked 'Bhele', who scored 16 goals in 82 games for Bafana Bafana, for his service to South African football.
"This is not goodbye that is coming from AmaZulu because we know what he has done for the country," he said.
"We've committed ourselves and we'll engage with Bhele to assist whenever we can in his retirement. We wish him the best but it doesn't end here.
"He is still part of coach Cavin Johnson's squad. So he's still got a contract with AmaZulu, we were just announcing that he was retiring at the end of the season."
Nomvethe has played once this season as a substitute in a 1-0 loss to SuperSport United at Lucas Moripe Stadium on August 8
Bhele, who broke through at African Wanderers in 1997, lead the line for Soweto giants Kaizer Chiefs and Orlando Pirates, as well as Italian trio Udinese, Salernitana and Empoli, Sweden's Djurgardens and Danish side Aalborg among others.
At the age of 34 he won the PSL Footballer of the Year and Lesley Manyathela Golden Boot awards for the second time with 20 goals for Moroka Swallows in 2011/12, as well as the League Player of the Season and Players' Player of the Season accolades. He previously won the prizes with Amakhosi in 1999/2000.