Из-за опоздания поезда наш утренний созвон начался на десять минут позже.

Из-за means because of or due to.

In this sentence, Из-за опоздания поезда means because of the train’s delay.

A useful nuance: из-за is often used for a cause with a negative or inconvenient result, so it fits very naturally here.

Because из-за requires the genitive.

So:

• опоздание = delay, being late
• after из-за, it becomes опоздания

This is just a case rule:

• из-за чего? = because of what?
• из-за опоздания = because of the delay

Because опоздание поезда means the delay of the train or the train’s delay.

The noun опоздание often takes another noun in the genitive to show who or what was late:

• опоздание поезда = the train’s delay
• опоздание автобуса = the bus’s delay
• опоздание рейса = the flight’s delay

So in the full phrase:

• из-за опоздания поезда
• literally: because of the delay of the train

Both nouns end up in the genitive, but for different reasons:

• опоздания — because of из-за
• поезда — because it depends on опоздание

Созвон is a fairly modern, conversational word meaning a call, often a planned work call, check-in, or quick meeting by phone or online.

So утренний созвон is something like:

• morning call
• morning check-in
• morning sync
• morning team call

It is common in workplace speech, especially in business or IT contexts.

It is less formal than some other options, such as:

• звонок = a call
• совещание = a meeting
• конференц-звонок = conference call

This is the subject of the sentence, so it is in the nominative case.

• наш = our
• утренний = morning
• созвон = call

All three words agree with each other:

• masculine
• singular
• nominative

That is why you get:

• наш утренний созвон

not some other form like нашего утреннего созвона, which would be a different case.

Because the subject созвон is masculine singular, and the verb in the past tense agrees with it.

• созвон is masculine
• so начаться in the past becomes начался

Compare:

• созвон начался = the call started
• встреча началась = the meeting started
• совещание началось = the meeting started

So the ending tells you the gender/number of the subject in the past tense.

Because начался is perfective, and here the sentence is about a single completed event: the call started at a certain time.

• начался = started, began
• начинался = was starting / used to start / started repeatedly or in a more process-focused way

In this sentence, the speaker is not describing an ongoing process. They are stating a fact about when the call began, so начался is the natural choice.

This means ten minutes later.

The pattern is:

• на + amount of difference + comparative

So:

• на десять минут позже = ten minutes later
• на час раньше = an hour earlier
• на два дня позже = two days later

Here:

• на introduces the amount of difference
• десять минут is the amount
• позже means later

This is a very common Russian structure.

Because after на in this kind of expression, the amount usually appears in the accusative.

With numbers, the form can look tricky, but here:

• десять минут is the normal form used after на
• минут is the genitive plural form required after десять

So the whole phrase follows standard number rules:

• десять минут
• пять минут
• двадцать минут

Compare:

• на одну минуту позже
• на две минуты позже
• на пять минут позже

The noun changes depending on the number.

Both mean later and both are usually possible here.

• позже = later
• позднее = later

In everyday speech, позже is often more common and natural. Позднее can sound a bit more formal or bookish in some contexts, though it is still perfectly normal Russian.

So this sentence could also be:

• ...начался на десять минут позднее

But позже is probably what you will hear more often.

Yes. That would be a very natural alternative.

Compare:

• Из-за опоздания поезда наш утренний созвон начался на десять минут позже.
• Из-за того, что поезд опоздал, наш утренний созвон начался на десять минут позже.

The difference is mainly structural:

• из-за опоздания поезда uses a noun phrase
• из-за того, что поезд опоздал uses a full clause

The second version may feel a bit more explicit to learners because it literally says because the train was late.

Both are correct.

Russian word order is flexible, and putting Из-за опоздания поезда first gives the reason up front.

That is very natural, especially when the speaker wants to frame the whole sentence with the cause:

• Because of the train’s delay, our morning call started ten minutes later.

You could rearrange the sentence, for example:

• Наш утренний созвон начался на десять минут позже из-за опоздания поезда.

This is also correct, but the original order sounds very natural because it introduces the reason first.