When will the Shekinah Glory appear in the 3rd Temple?
According to Ezekiel the Shekinah Glory will next appear following the 2nd Coming when His presence will once more fill the Temple, never to leave again.
The glory of the LORD entered the temple through the gate facing east. Then the Spirit lifted me up and brought me into the inner court, and the glory of the LORD filled the temple. While the man was standing beside me, I heard someone speaking to me from inside the temple. He said: “Son of man, this is the place of my throne and the place for the soles of my feet. This is where I will live among the Israelites forever.” (Ezekiel 43:4-7)