There have been a few cases in the media; though not necessarily focused on feelings of guilt. One couple in Amsterdam¹ lost their child and suffered a strong emotional response whenever people outside would gawk at their house with a solemn look after encountering the Stolperstein placed in the pavement there (they were branded neo-Nazis on social media for daring to speak out).

1: https://www.volkskrant.nl/nieuws-achtergrond/echtpaar-staakt...