There are no settings to ignore attributes/properties from deserialization.
The settings:
SharpSerializerSettings.AdvancedSettings.AttributesToIgnore
SharpSerializerSettings.AdvancedSettings.PropertiesToIgnore
Are only used to ignore from serialization, not from deserialization.
It would be nice if there was a built in way to do this.
I found a workaround from an answer I got to a question I posted about this here:
SharpSerializer: Ignore attributes/properties from deserialization