In 1659, he was assassinated by his maternal uncle, Abdul Karim Abu Bakr Al-Shabani.
[2][3] His uncle assumed power as Sultan in Marrakesh until 1667 when he was in turn murdered, it happened shortly before the Alaouite Sultan Moulay Al-Rashid of the current ruling Dynasty conquered the city in 1668.
[4][5]: 230 In 1659, Ahmed al-Abbas witnessed his capital Marrakesh besieged by his maternal uncle, Abdul Karim Abu Bakr Al-Shabani who was his General of armies.
As the situation was worsening, Sultan Ahmed al-Abbas's mother thought a good idea for her son to go meet his uncle, and make peace with him and the Chabanate.
She reportedly drugged Abdul Karim Abu Bakr Al-Shabani, slaughtered him and ordered his body to be trained out of the Palace, which was carried out.