Riek machar is appointed south sudans vice president for third time

I think there may be some confusion here.

Riek Machar, a South Sudanese politician, has indeed held the position of Vice President of South Sudan twice, not three times. Here's a brief summary of his political career:

  1. First term as Vice President (2011-2013): Machar was appointed as the First Vice President of South Sudan in 2011, following the country's independence from Sudan. He served in this position until July 2013, when he resigned due to disagreements with President Salva Kiir.
  2. Second term as Vice President (2016-2017): Machar was re-appointed as the First Vice President of South Sudan in 2016, as part of a peace agreement aimed at ending the country's civil war. However, he was forced to flee the country in July 2017 after a renewed outbreak of violence in the capital, Juba.

There has been no third appointment of Riek Machar as Vice President of South Sudan.