Complex sentence: It was to be Brunei's turn but it expressed its interest to host the 2019 Games instead of the 2017 edition and thus this resulted in Malaysia being chosen as the host for the 2017 Games.
Split into simpler sentences: It was to be Brunei's turn but it expressed its interest to host the 2019 Games instead of the 2017 edition. Malaysia was chosen as the host for the 2017 Games.