"Fences, borders are re-emerging in Europe. It challenges the whole integration of the EU [European Union] and it challenges the moral responsibility to provide asylum," Peter Sutherland told reporters.
Sutherland added that he decries the nationalist approach that some of the states have assumed amid the migrant influx.
He added that the political leadership of such states and the media bear responsibility for this nationalist approach.
In response to the growing number of migrants reaching their territories, several EU states, such as Hungary, Bulgaria and Slovenia, which are used primarily as a transit routes by refugees, have built fences on their borders.
A number of European states, including Austria and Germany, have also toughened their border checks, introducing special procedures on their borders, to curb the influx of refugees.