Joe Schmidt will help New Zealand prepare for the first Test against Ireland at Eden Park on Saturday after head coach Ian Foster and two of his assistants tested positive for COVID-19.
Foster and assistant coach John Plumtree tested positive for coronavirus at the weekend and Scott McLeod is the latest coach to contract the virus.
Former Ireland head coach Schmidt will work with the New Zealand squad this week in the absence of that trio.
Centres David Havili and Jack Goodhue have also tested positive for COVID-19, so Braydon Ennor has been called up to join the squad in Auckland.
Foster said: "Joe will come in for Tuesday and Thursday's training this week, and we're really grateful to have his help.
"We've planned for this kind of disruption and we've got back-up plans and people on standby. Joe was one of those people we could call on."
Foster added: "I've got every confidence in our coaching group, and in our senior leaders who are all stepping up in what’s a massive test for us.
"Everyone has had to deal with these kinds of disruptions over the past couple of years. This is a real opportunity for the coaching group and team to pull together."
Test week has begun pic.twitter.com/1NBMN8QEFs— All Blacks (@AllBlacks) June 27, 2022