Ṭhē is an additional letter of the Arabic script.
It has the basic shape of tāʼ (ت), but with vertical dots, rather than horizontal.
It is not used in the Arabic alphabet itself, but is used to represent an aspirated [ʈʰ] in Sindhi, a language mainly spoken in Pakistan.
In an older version of the script, the ٽ was used instead of ٺ and vice versa.
The letter is encoded in the Arabic Unicode block as Tteheh at U+067A.