Toplantı saati değiştiğine göre sizi birazdan yeniden arayacağım.

Değiştiğine göre is a very common Turkish pattern meaning something like:

• since ...
• given that ...
• considering that ...
• if it’s true that ...

It is built from:

• değişmek = to change
• değiştiği = that it changed / its having changed
  This is a nominalized clause.
• değiştiğine = to/for the fact that it changed
  The ending -e / -a is there because göre normally takes the dative case.
• göre = according to / considering / given

So Toplantı saati değiştiğine göre means something like since the meeting time has changed or given that the meeting time has changed.

Because this is a noun compound in Turkish.

• toplantı = meeting
• saat = hour / time
• toplantı saati = meeting time

In this type of compound, the first noun stays bare, and the second noun takes a possessive-type ending:

• toplantı saat-i

That is why you get saati instead of plain saat.

This structure is extremely common in Turkish:

• okul kapısı = school door
• araba anahtarı = car key
• toplantı saati = meeting time

Not here.

In toplantı saati, the -i is part of the noun compound, not the accusative.

So this is:

• toplantı saat-i = meeting time

not

• saat-i = the time as a direct object

This can be confusing, because the same form can look identical on the surface. In this sentence, it is clearly the compound form because toplantı saati functions as a single noun phrase.

Because göre normally requires the dative case.

Compare:

• bana göre = according to me
• sana göre = according to you
• duruma göre = according to the situation

The same thing happens with a whole clause:

• değiştiği = the fact that it changed
• değiştiğine = according to / given the fact that it changed

So the -ne part is there because göre needs it.

Because sizi is the object form of siz.

• siz = you
• sizi = you (as the direct object)

The verb aramak means to call someone, so the person being called is the direct object:

• Sizi arayacağım = I will call you

Also, Turkish personal pronouns usually show case clearly, so you cannot leave it as siz here.

It can mean either:

• you all
• you in a polite/formal sense

So sizi arayacağım could mean:

• I’ll call you (formal singular)
• I’ll call you all (plural)

Only context tells you which one is meant.

If it were informal singular, it would be:

• seni arayacağım = I will call you

Because the verb stem is ara-, which ends in a vowel.

When the future suffix is added, Turkish inserts a buffer y between two vowels:

• ara-
• -acak / -ecek = future
• -ım / -im / -um / -üm = first person singular

So:

• ara + yacak + ım = arayacağım

This is completely regular. The y is just there to make pronunciation smoother.

Birazdan means:

• in a little while
• soon
• shortly

It is very common when talking about something that will happen a bit later, but not much later.

So:

• sizi birazdan arayacağım = I’ll call you shortly

It comes historically from biraz + -dan, but as a learner, it is easiest to treat birazdan as a fixed adverb meaning soon / in a moment.

Yeniden means:

• again
• anew

So:

• yeniden arayacağım = I will call again

In natural English, this often becomes call back, depending on context.

You could also hear tekrar in similar sentences:

• sizi tekrar arayacağım

Both are common. Yeniden can sound slightly more like again/anew, while tekrar is a very common everyday word for again.

Because Turkish normally puts the finite verb at the end.

The sentence is organized like this:

• Toplantı saati değiştiğine göre = since the meeting time has changed
• sizi = you
• birazdan = shortly
• yeniden = again
• arayacağım = I will call

This is very natural Turkish word order: background information first, main action last.

English does not work this way as consistently, so this often feels unusual to learners at first.

Yes, Turkish word order is flexible, but the verb usually stays at the end in a normal statement.

For example, these are possible with different emphasis:

• Toplantı saati değiştiğine göre sizi birazdan yeniden arayacağım.
• Sizi birazdan yeniden arayacağım, toplantı saati değiştiğine göre.
• Sizi yeniden birazdan arayacağım.
  This is possible, but the emphasis changes and it may sound less natural in some contexts.

The version you were given is a very natural, standard order.

Not always.

With nouns and pronouns, it often means according to:

• bana göre = according to me
• kurallara göre = according to the rules

But with a clause like değiştiğine göre, it often means:

• since
• given that
• considering that
• if that’s the case

So the basic idea is still in view of that / based on that, but the most natural English translation changes with context.

Yes. Biraz sonra is also very common and usually means almost the same thing:

• Sizi biraz sonra yeniden arayacağım.

Both birazdan and biraz sonra can mean in a little while.

Very roughly:

• birazdan can feel a bit more like shortly / any moment now
• biraz sonra can feel a bit more literally like a little later

But in many everyday situations, they are interchangeable.

A fairly literal breakdown would be:

• Toplantı saati = meeting time
• değiştiğine göre = given that it has changed / since it has changed
• sizi = you
• birazdan = shortly
• yeniden = again
• arayacağım = I will call

So the sentence structure is basically:

• Given that the meeting time has changed, I will call you again shortly.

That kind of breakdown can help you see how Turkish builds meaning step by step.