Kamp sandalyesi katlanır masanın yanında.

In Turkish, the present-tense form of to be is often not said in simple third-person sentences.

So:

Kamp sandalyesi katlanır masanın yanında.
literally works like: The camp chair next to the folding table.

But the full meaning is understood as:

The camp chair is next to the folding table.

This is very normal in Turkish. English needs is here, but Turkish usually does not.

Because this is a very common Turkish noun + noun compound pattern.

• kamp = camp / camping
• sandalye = chair
• kamp sandalyesi = camp chair / camping chair

In this pattern, the second noun usually takes a compound marker that looks like a possessive ending:

• çay bardağı = tea glass
• otobüs durağı = bus stop
• kamp sandalyesi = camp chair

So kamp sandalyesi does not mean the chair actually belongs to a camp. It is just the normal way to form this kind of compound in Turkish.

Not exactly. Kamp is still basically a noun, but Turkish often uses nouns to modify other nouns.

So instead of an adjective like English camping in camping chair, Turkish uses:

kamp + sandalyesi

This is very common in Turkish. So English often uses:

• adjective + noun

while Turkish often uses:

• noun + noun compound

Here katlanır describes the table: katlanır masa = folding table.

It comes from the verb katlanmak = to fold / to be folded.

In this kind of use, katlanır acts like an adjective meaning something like:

• folding
• foldable
• that folds

So:

• katlanır masa = folding table
• katlanır sandalye = folding chair

This is a very common product-description style in Turkish.

Because in Turkish, descriptive words usually come right before the noun they modify.

So:

• katlanır masa = folding table

Then that whole phrase becomes:

• katlanır masanın yanında = next to the folding table

So the structure is:

[Kamp sandalyesi] [katlanır masanın yanında].

That means:

• kamp sandalyesi = the camp chair
• katlanır masanın yanında = next to the folding table

Because yanında normally takes the other noun in the genitive form.

So the pattern is:

X-in / X-ın / X-un / X-ün yanında = next to X

Examples:

• evin yanında = next to the house
• arabanın yanında = next to the car
• masanın yanında = next to the table

So:

• masa = table
• masanın = of the table / the table's

In natural English, you would not translate it literally as of the table here. The whole expression just means next to the table.

Yanında comes from yan = side.

Its structure is roughly:

• yan = side
• yanı = its side
• yanında = at/on/by its side

So:

masanın yanında
literally: at the table's side
natural English: next to the table

This is part of a very common Turkish pattern with location words such as:

• önünde = in front of
• arkasında = behind
• üstünde = on top of
• altında = under
• yanında = next to / beside

Because this sentence is describing where the camp chair is, not introducing the existence of one.

Compare:

• Kamp sandalyesi katlanır masanın yanında.
  = The camp chair is next to the folding table.

• Katlanır masanın yanında bir kamp sandalyesi var.
  = There is a camp chair next to the folding table.

So:

• use a zero-copula sentence like this one when talking about the location of something already understood
• use var when you want to say that something exists / there is

Turkish does not have a word exactly like English the.

And bir can mean a/an or one, but it is not always necessary.

So:

• Kamp sandalyesi katlanır masanın yanında.
  can mean The camp chair is next to the folding table or, depending on context, something close to A camp chair is next to the folding table.

If you say:

• Bir kamp sandalyesi katlanır masanın yanında.

that more clearly introduces a camp chair.

Context usually tells you whether English should use the or a.

Yes, Turkish word order is fairly flexible, but different orders change the focus or emphasis.

Your sentence is a natural way to say:

The camp chair is next to the folding table.

If you want a more there is style sentence, you could say:

Katlanır masanın yanında bir kamp sandalyesi var.

That puts more focus on the location first, then introduces the chair.

So the original order is good for talking about the camp chair, while other orders can shift attention to the place or to the existence of the object.

The Turkish ı is the dotless i, and it does not sound like English ee in see.

It is a deeper, more central/back vowel. There is no perfect English equivalent, but you can think of it as a short, relaxed vowel somewhat like the unstressed vowel in some English syllables, though not exactly the same.

In this sentence:

• katlanır
• masanın
• yanında

all contain ı.

A rough pronunciation guide:

• katlanır ≈ kat-la-nuhr
• masanın ≈ ma-sa-nuhn
• yanında ≈ ya-nuhn-da

These are only approximations, but they can help you avoid pronouncing ı like ee.