In no particular order. Feel free to leave your own recommendations, suggestions.
Quien Puede Matar A Un Nino/Who Can Kill A Child?
Who Can Kill a Child?
Pan’s Labyrinth (Spain)
Let the Right One In (Låt den rätte komma in) – 2008
The Eye (Gin Gwai)(Hong Kong/Singapore) – 2002
Pulse (Kairo) – 2001
Ringu – 1998
Rec – 2007
Memories of Murder (Korea)- More a thriller, but one of such nail-biting suspense it bleeds into the Horror category the way SEVEN would
Diabolique (France)- if you can see this film without being spoiled, or knowing anything about it, it’s an incredibly powerful film, and earns its place on any list.
M (1931-German)- Everything you know about horror film, from the brilliant to the bloody, about tension, about atmosphere, about darkness that walks at day, is sourced from this film. Even if a horror/suspense filmmaker hasn’t seen this film, they’ve been influenced by a film or filmmaker, that was influenced by this film.
Brotherhood of the Wolf (French- A drama/thriller but it bleeds enough into horror to be considered. In-fact it’s more disturbing than most straight up horror movies)