Complex sentence: After his father's death on 13 October 2016, he was expected to succeed to the throne of Thailand, but asked for a delay, saying he needed "time to prepare before being proclaimed as the new king".
Split into simpler sentences: After his father's demise on 13 October 2016, he was expected to succeed to the throne of Thailand. But he asked for a delay, saying he needed "time to prepare before being proclaimed as the new king".