F3 How many years does it take for relatives of American immigrants to immigrate now?

The planned date of F3 is now September 2000. If you applied in 1999, you should have received the notice by now.

However, this date should be counted from the day when the consulate replies to your letter saying that it accepts your application.

Supplementary answer:

In other words, there are still more than three years before the scheduled date. At present, the scheduled progress is very slow, and it is inevitable to wait for more than six years. However, there is still a chance for immigrants. Although it is slow, it will come one day. The specific time can only be determined according to the amount of immigrants from China given by the United States every year.

As far as I know, there are many people waiting for their relatives to emigrate for more than ten years. So it's normal to be patient and slow down.