“He has no phone, money, identification or bank cards with him and may be confused, distressed, unable to communicate clearly or disoriented,” the family said in a message shared with the Herald.
“He also has a prosthetic leg, which affects his mobility and balance, making him a very high fall risk.
“He was last seen with a wheelchair/walking aid in the Notre Dame area of Paris several days ago (night of the Paris riots) and has not been seen since.”
New Zealander Kurt McNamara went missing on Saturday, May 30 (local time).
The message said French Police, New Zealand authorities and the NZ Embassy were involved, “but we are asking the public to please help share his photo and information as widely as possible”.
The family said they are “exhausted and worried sick”.
The Ministry of Foreign Affairs and Trade (MFAT) confirmed it is “providing assistance to a New Zealander and their family in Paris”.
“For privacy reasons no further information will be provided,” an MFAT spokesperson said.
About 219 people were reportedly injured in clashes between football fans and local police across France after Paris Saint-Germain’s victory over Arsenal in the Champions League final on Saturday.
The unrest was largest in Paris, where thousands of officers were deployed, with 57 injured.