Hi,
I was wondering what left still has to happen before Jesus can return. I heard the third temple must be built first, and what else must happen?
There are a multitude of things that must have to happen. The rapture that other posters are speaking about, anytime, be believing, and hopeful (Luke 21:34-36).
But of the other things, that we can put on a chart, the main ones are, in order:
1. The ten kings (leaders) of the fourth kingdom of Daniel 7 and the little horn person come to power over them.
2. Then the Gog/Magog attack on Israel, of Ezekiel 38/39.
3. Then the 7 years, started by the Antichrist person, the second half of which are the great tribulation.
4. Then Jesus Returns down to earth to end the great tribulation, and bring the Kingdom of God to be the ruling kingdom over the earth.
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Somewhere between now and the first couple of months of the 7 years, a temple of some sort has to rebuilt in Jerusalem. We don't know exactly when. In general, sometime over the next ten years (approximate).
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Here is a chart I made that may help you. There is a lot involved. I am 71 years old, and it took about 50 years to know what to put on the chart and where. There is one main arch villain during this time. Being the Antichrist is only one role of person. It is not Trump.
Just follow the path from upper left hand corner to lower right corner.