1. From the managements settings for the relationship field’s object, go to Fields.
2. Scroll to the Custom Fields & Relationships relatedlist.
3. Click the name of the field containing the lookup filter.
4. Click Edit.
5. To deactivate the lookup filter, deselect Enable this filter, then save your changes.Deactivating a lookup filter preserves the lookup filter configurationbut:Prevents it from applying to the relationship fieldPrevents it from impacting the cross-object references limitRemoves it as a dependency for fields referenced in the lookupfilter criteria
6. Prevents it from applying to the relationship field
7. Prevents it from impacting the cross-object references limit
8. Removes it as a dependency for fields referenced in the lookupfilter criteria
9. To delete the lookup filter, click Clear Filter Criteria, then save your changes.Deleting a lookup filter permanently removes it. You can’trecover deleted lookup filters.