English doesn't typically use diminutive suffixes.
Sometimes, English will use "ie" to show affection. A mother might call her child, "sweetie."
Also, sometimes, you can put "-let" or "-ette" at the end of a word. However, you can't just add these suffixes to any word that you want to. They are only used with specific words, and it's best to just learn those words by memory.
Some examples:
booklet - short book
eyelet - small hole (typically in fabric)
piglet - baby pig
kitchenette - a small kitchen (usually against the wall of a bigger room, and includes a sink, refrigerator, and microwave)
novelette - short novel (also called a novela)