According to the checklist, when deleting a series or study in local storage of the DICOM Browser, the corresponding patient (and corresponding study, for a series) will only be deleted if this was the last series / study. However, the whole patient is always deleted, regardless if there are still studies / series left.
Steps to reproduce:

• Load a DICOM dataset with multiple series in the DICOM Browser (e.g. ANONYMI from the TestData folder)
• Add it to local storage
• Select a series and press "Delete"
• -> The complete patient is removed from storage