Kamau failed to show up Wednesday for the hearing after his lawyers told the court that he is on bed rest for two weeks following a directive by his doctor.
Kamau is facing abuse of office charges and the hearing was scheduled for Wednesday and Thursday.
Kamau was charged with abuse of office and failure to follow procurement rules and was released on a Sh1 million cash bail.
His co-accused, Nicholas Mburu Ng’ang’a, also denied the same charges and was released on similar terms, while the third accused, Kaka Matemu Kithyo, was released on a Sh600,000 bail by Senior Principal Magistrate Lawrence Mogambi.
The former CS, along with five others, is accused of not following procurement rules in awarding the tender for the construction of the Kamukuywa-Kaptama- Kapsokwony-Sirisia road.