Ako bude još jedan izostanak, donijet ću ispričnicu i pitati može li moja kći posuditi lektiru.

After ako meaning if, Croatian normally does not use će for future in this kind of clause.

So:

• Ako bude još jedan izostanak = If there is / if there ends up being one more absence

Here bude is the form used to refer to a future situation after ako. English uses present tense in similar cases too: If there is another absence..., not if there will be another absence....

This is very common in Croatian:

• Ako bude vremena, doći ću. = If there is time, I’ll come.
• Ako nađeš knjigu, javi mi. = If you find the book, let me know.

So bude here is the normal choice.

It means one more absence or another absence.

Breakdown:

• još = still, yet, more, another
• jedan = one
• izostanak = absence

So together:

• još jedan izostanak = one additional absence

In this sentence, it probably refers to one more school absence.

Yes. Izostanak means absence or being absent.

In school contexts, it often means:

• an absence from class
• a missed school day or lesson

Examples:

• Imala je jedan izostanak. = She had one absence.
• Neopravdani izostanak = an unexcused absence
• Opravdati izostanak = to excuse/justify an absence

So in this sentence, it is clearly school-related.

Croatian future tense is formed with the infinitive plus forms of htjeti such as ću.

With verbs whose infinitive ends in -ti, the final -i drops before the future clitic:

• donijeti → donijet ću
• pisati → pisat ću
• čitati → čitat ću

So donijeti ću is not the standard form here. The standard form is:

• donijet ću = I will bring

You can also place ću before the infinitive:

• Ja ću donijeti...

Both are correct, but in your sentence the verb comes first, so you get donijet ću.

Because the same future auxiliary can govern both infinitives.

So:

• donijet ću ispričnicu i pitati...

means:

• I will bring an excuse note and ask...

The ću applies to both donijet and pitati.

This is very natural in Croatian, just like in English:

• I’ll bring the note and ask...

You do not need to repeat the future marker before the second verb.

Not here.

In a school context, ispričnica means an excuse note or a note explaining/justifying an absence.

It is usually a note from:

• a parent
• a doctor
• sometimes another official source

So:

• donijet ću ispričnicu = I will bring an excuse note

This is different from:

• isprika = apology

So even though the words are related, ispričnica here is not really an apology in the everyday English sense.

Because both are direct objects, so they are in the accusative singular.

• ispričnica → ispričnicu
• lektira → lektiru

You can see them as the things being affected by the verbs:

• donijet ću ispričnicu = I will bring an excuse note
• posuditi lektiru = to borrow the required reading/book

This is a very common -a → -u pattern for feminine nouns in the accusative singular.

In school Croatian, lektira usually means required reading or a required-reading book/text.

Depending on context, it can refer to:

• the school reading list in general
• a specific book assigned for school

In this sentence:

• posuditi lektiru

most naturally means:

• to borrow the required reading
• or to borrow the assigned book

So it is not just any book. It strongly suggests a school book that students are expected to read.

Može li is the standard way to form a yes/no question with moći.

• može = can / is able to
• li = question particle

So:

• može li moja kći posuditi lektiru = can my daughter borrow the required reading?

After pitati, Croatian often uses this structure for an indirect yes/no question:

• pitati može li... = to ask whether/can...

Compare:

• Pitat ću: Može li moja kći posuditi lektiru? = I will ask: Can my daughter borrow the required reading?
• Pitat ću može li moja kći posuditi lektiru. = I will ask whether my daughter can borrow the required reading.

Because this is an indirect yes/no question, and Croatian usually uses li for that.

So:

• pitati može li... = ask whether / ask if ... can

If the sentence were about asking someone to do something, then da might appear in other structures. But here the meaning is:

• asking whether the daughter can borrow the book

That is why može li is the natural form.

Because moja kći is the subject of može li ... posuditi.

• moja = my
• kći = daughter

So:

• može li moja kći posuditi lektiru = can my daughter borrow the required reading

In standard Croatian, kći is the nominative singular form, which is the form used for the subject.

This noun is a little irregular, so learners often notice it.

Because after može you normally use an infinitive:

• može posuditi = can borrow

So the structure is:

• može li moja kći posuditi lektiru

This is parallel to English:

• Can my daughter borrow the required reading?

Also, posuditi is perfective, which fits the idea of one complete action: borrowing a particular book.

Because the sentence begins with an if-clause:

• Ako bude još jedan izostanak, ...

Croatian normally separates that introductory subordinate clause with a comma from the main clause.

So the structure is:

• Ako... , donijet ću...

This is the standard punctuation pattern.

Yes. That is a very close grammatical match.

A more literal breakdown would be:

• Ako bude još jedan izostanak = If there is one more absence
• donijet ću ispričnicu = I will bring an excuse note
• i pitati = and ask
• može li moja kći posuditi lektiru = whether my daughter can borrow the required reading

That literal version helps show how the Croatian structure works, even if a smoother English translation might phrase some parts a little differently.