Tighthead Sinckler, 24, was returned to his upmarket hotel in a police car hours early on Sunday after police attended an incident involving "minor disorder" in central Auckland.
"A male was placed under arrest but was not charged after further inquiries established that the incident did not warrant prosecution," police said.
It is understood the incident took place on Galway St in central Auckland about 3am.
Hours earlier the 122kg Sinckler had come on in the third test at Eden Park, with the 15-15 draw earning the British and Irish Lions a share of the series.
