This read-only Counter32, in units of table entries per its source description, counts the number of times an entry has been deleted from the ptopoConnTable. Admins use this alongside ptopoConnTabInserts and ptopoConnTabAgeouts to understand how often topology entries are being removed, whether through normal age-out or explicit administrative/agent action. For example, a spike in TabDeletes correlating with a scheduled maintenance window would confirm expected topology cleanup rather than an unexpected mass loss of neighbor information.