The three are among other Pacific Islanders who had their visas approved by Immigration New Zealand.
Immigration New Zealand said the 16 people from Fiji and Samoa were approved for their visas between July 2016 and July 2019.
RNZI reports in total, there were 17 successful applications - including from one person who made multiple applications.
Immigration's visa services manager, Michael Carley, said overall there were 92 individual applications decided under the category since 2016.
Immigration could not determine if any of the Pacific cases were connected to known cases of exploitation or trafficking in New Zealand.
"In order to provide further information on these cases and to determine if they were connected to known cases of exploitation / trafficking in New Zealand would require a manual research into each individual application," Mr Carley said.
"This manual search may both include a review on the Immigration Application Management System as well as the application's physical files which would not be easily obtained," he said.