
Singapore’s Prime Minister Lee Hsien Loong will be taking leave from 7 June to 11 June, and because he will remain contactable during the period, no acting Prime Minister will be appointed.
Because Heng Swee Keat stepped aside as the Deputy Prime Minister in April (Heng would’ve been the acting PM), PM Lee therefore reverted to the previous arrangement where Senior Minister Teo Chee Hean will become the acting PM during PM Lee’s absence.
PM Lee previously said (on 8 April when responding on queries about acting PM) that SM Teo’s appointment is “the interim arrangement until such time as the 4G chooses a new leader from among themselves.”

Images source: Lee Hsien Loong Facebook