看ica的网页，有一个
For the application of Long Term Visit Pass to be successfully submitted, please note that applicant must have a minimum valid stay of 10 days.
这是说进来新加坡10天之后才可以申请？谢谢先！

本人今年3月父母入境第二天申请，5周批准。

-申请人必须有至少10天有效的居留。