我係釣水邊下面3米左右
I was about three meters below the water.

Cantonese Sentence Breakdown

我 ngo5
I
me
my
us
we
our
self
係 hai6
(Cantonese) to be
to connect
to relate to
to tie up
to bind
to be (literary)
to involve
relation
relationship
consequence
yes
indeed
right
釣 diu3
to fish with a hook and bait
to tempt
to lure
a fishhook
水邊 seoi2 bin1
waterside
下面 haa6 min6
below
米 mai5
rice M: 粒lì [粒]
meter (classifier)
grain-like things
money
a cigarette
左右 zo2 jau6
(adjective) 1. about; (noun) close subordinate