As Harry begins his sixth year at Hogwarts, he discovers an old book marked as 'Property of the Half-Blood Prince', and begins to learn more about Lord Voldemort's dark past.
This movie contains 41 potentially triggering events.
Spoilers:
When Harry is in the cave with Dumbledore, the inferi (living corpses) grab Harry and pull him underwater, holding him there, but Harry manages to get out
There are jokes about a female character attempting to drug a male character with a love potion, but no indication that sexual assault would have resulted had the attempt been successful.
In flashback incidents, an implied sexual assault on a man (a woman drugs him with a love potion and later gets pregnant by him while he is still under the influence of the potion) is treated with the grave severity it deserves.
Not too many, but there is an effective scare in the Cave scene at around the 2 hour mark.
Here are the Jump Scare times if you haven't watched Harry Potter yet, but you HATE Jumpscares.
MAJOR Scares in Capital letters.
(Minor) (04:50) When Harry touches Dumbledore's arm. For a few seconds we then see a loud stretched image of Harry screaming as he travels, which may jump sensitive viewers
(Minor) (06:48) Slughorn's head pops up from the sofa chair as Dumbledore approaches him
(Minor) (49:56) A Girl suddenly gets violently tossed whilst getting cursed by the necklace
(Minor) (1:51:20) When Harry touches the ring, there is a short sharp flashback
(MAJOR) (2:01:33) WHEN HARRY GOES TO COLLECT THE WATER, A HAND SUDDENLY GRABS HIS WRIST FROM ABOVE THE WATER
Not exactly because a character looks like they are seeing things and pleading for someone or something to have mercy, to forgive him and to spare harry.