Nada más pasar por el quiosco, compré el periódico y una botella de agua.

It means as soon as or right after doing something.

So:

• Nada más pasar por el quiosco... = As soon as I passed by/stopped at the kiosk...

This is a very common Spanish structure:

• Nada más llegar, me llamó. = As soon as he/she arrived, he/she called me.
• Nada más terminar, se fue. = As soon as he/she finished, he/she left.

Here, nada más does not literally mean nothing more. In this pattern, it expresses immediacy in time.

Because after nada más, Spanish often uses an infinitive to express as soon as doing X.

So instead of saying:

• Nada más pasé por el quiosco... ❌

Spanish says:

• Nada más pasar por el quiosco... ✅

This works when the subject of both actions is the same. In this sentence, the person who passed by the kiosk is also the person who bought the newspaper and water.

It is similar to English structures like:

• After passing by the kiosk...
• Upon passing by the kiosk...

But in natural English, as soon as I passed by the kiosk... is usually the best match.

The verb pasar por often means to pass by, to go by, or sometimes to stop by a place.

So:

• pasar por el quiosco = to go past the kiosk / to pass by the kiosk

In this sentence, because the speaker then buys something there, the idea may be something like:

• as soon as I went by the kiosk
• as soon as I stopped at the kiosk

The exact English wording depends on context, but por is the normal preposition with pasar in this sense.

Compare:

• Pasé por tu casa. = I went by your house / I stopped by your house.
• Pasamos por Madrid. = We passed through Madrid.

Because compré describes a completed action in the past:

• compré = I bought

The sentence tells a sequence of events:

1. I passed by the kiosk.
2. I bought the newspaper and a bottle of water.

That kind of completed, one-time action usually takes the preterite in Spanish.

If you used the imperfect, such as compraba, it would sound more like a repeated or ongoing action, which does not fit this sentence well.

Because Spanish often leaves out subject pronouns when the verb already makes the subject clear.

• compré already means I bought
• so yo compré is usually unnecessary

Spanish does this all the time:

• Fui al centro. = I went downtown.
• Comimos tarde. = We ate late.

You could say yo compré for emphasis or contrast, but in a neutral sentence it is normally omitted.

This is a very natural article choice in Spanish.

el periódico

Spanish often uses the definite article when talking about something understood in context, especially everyday items:

• comprar el periódico = buy the newspaper

This often implies the usual newspaper, today’s paper, or simply the newspaper in a general, familiar sense.

una botella de agua

Here the speaker is introducing one bottle of water, so the indefinite article is natural:

• una botella de agua = a bottle of water

So the contrast is normal:

• el periódico = a specific/contextually understood item
• una botella de agua = one item, not previously identified

In Spain, quiosco usually means a kiosk or newsstand, especially a small place where you buy things like:

• newspapers
• magazines
• water
• snacks
• cigarettes
• lottery tickets, sometimes depending on the place

So in this sentence, it makes perfect sense to buy both el periódico and una botella de agua there.

Also note the spelling:

• quiosco is the standard spelling in modern Spanish
• you may also see kiosco, which is accepted too

In Spain, quiosco is very common.

In Spain, quiosco is pronounced roughly like:

• kee-OS-ko

The stress is on the OS syllable:

• qui-OS-co

A rough English approximation is kee-OHS-koh.

Yes. Several alternatives are possible, with slightly different style or nuance.

Very similar alternatives:

• Al pasar por el quiosco, compré...
• En cuanto pasé por el quiosco, compré...
• Apenas pasé por el quiosco, compré...

Nuance:

• Nada más pasar por... = as soon as I passed by...
• Al pasar por... = when passing by / on passing by
• En cuanto pasé por... = as soon as I passed by...
• Apenas pasé por... = also hardly had I passed by / as soon as I passed by

In this sentence, nada más pasar por... sounds very natural and emphasizes how quickly the second action happened.

It can suggest either, depending on context.

Literally, pasar por means to pass by or to go by a place. But in real usage, it can also mean to stop by somewhere briefly.

In this sentence, because the speaker bought something there, the listener will naturally understand that the person went to the kiosk / stopped there at that moment.

So the phrase keeps the basic idea of going by that place, but the rest of the sentence shows that the person did more than just walk past it.

Because Nada más pasar por el quiosco is an introductory time clause.

Spanish often puts a comma after an introductory clause, especially when it comes before the main clause:

• Nada más pasar por el quiosco, compré...

This is very natural and clear in writing.

You may sometimes see short introductory elements without a comma, but here the comma is standard and helpful.

Not in this meaning.

To express as soon as, the normal structure is:

• nada más + infinitive
• nada más + finite verb in some contexts
• nada más llegar, nada más verlo, etc.

Adding que here would usually not sound right for this sentence:

• Nada más que pasar por el quiosco... ❌

That would not naturally mean as soon as I passed by the kiosk.

So for this sentence, stick with:

• Nada más pasar por el quiosco... ✅

Yes, it feels very natural in Spain for a couple of reasons:

• quiosco is a very familiar everyday word in Spain
• el periódico is a very natural way to say the newspaper
• the structure nada más + infinitive is common and idiomatic

The sentence would also be understood perfectly in Latin America, but the image of buying a newspaper and water at a quiosco feels especially typical of Spain.