Notably, the decision from Southee followed the Black Caps disheartening series loss against Sri Lanka in Galle last month.
However, the Kiwi pacer's decision to step down from the role was made in the best interests of the team, the Black Caps confirmed that Tom Latham will take over the reigns from Southee in the longest format.
It is to be noted that Southee led New Zealand in 14 Tests with a record of six wins, six losses and two draws since taking over from Kane Williamson in 2022.
I can best serve the team moving forward is focusing on my performances on the field: Southee
The 35-year-old Kiwi pacer, who called off his time as the Test captain of New Zealand, added that it was his own decision to step down from the helm as he aims to focus on his playing role. "Captaining the Blackcaps in a format that's so special to me, has been an absolute honour and a privilege.
I've always tried to put the team first throughout my career and I believe this decision is the best for the team,' Southee said in a statement released by the Black Caps.