Found this online:
Quote:
Before considering marriage, remember that obtaining PR, work
permit or even long term social visit passes are neither easy nor
an automatic right.
ICA considers applications and appeals on a case by case basis
and does not publicize the guidelines it uses to do so.
Factors include whether someone has committed immigration
offences (working illegally, overstaying or vice), or even whether
suspected of having done so. Eg making many frequent trips
into Singapore may lead to a suspicion of illegal work.
Find out the facts truthfully from your partner before you
decide to marriage and have a pan in case your application does not
succeed.
Quote:
"It was disclosed in Parliament in May last year that on
average, 6,700 foreign spouses of Singaporeans were denied
long-term visit passes or permanent residency per year from 2005 to
2009."
http://www.todayonline.com/Voices/EDC110915-0000383/Let-us-keep-our-spouses-by-our-sides