A property considered undesirable due to an event that has occurred there is:

"Clouded" typically refers to a lack of clarity or transparency, often in a metaphorical sense, such as emotions or thoughts being obscured. It does not imply a negative reputation associated with an event, and therefore does not convey the sense of undesirability tied to a specific incident.

"Traumatized" describes an individual who has experienced severe emotional shock, but it does not pertain to properties or places. While it indicates a negative effect due to an event, it is more applicable to personal experiences rather than the perception of a location or property.

"Shrouded" implies being covered or concealed, often leaving something hidden from view or unclear. While this may suggest mystery or secrecy, it does not inherently relate to an event causing a property to be viewed as undesirable or stigmatized.