يستوفي مقدم الطلب شروط الجنسية في القنصلية.

That is a very normal Arabic word order. Arabic often uses verb–subject–object order:

• يستوفي = fulfills / meets
• مقدم الطلب = the applicant
• شروط الجنسية = the citizenship requirements

So يستوفي مقدم الطلب... is structurally very natural in MSA.

You could also say:

• مقدم الطلب يستوفي شروط الجنسية...

That version is also correct, but it feels more like The applicant is the topic of the sentence. Starting with the verb is simply the more straightforward narrative style.

يستوفي is the imperfect (present/future) form of استوفى.

Its basic meaning is to fulfill, satisfy, complete in full, meet requirements.

So here يستوفي شروط الجنسية means to fulfill / meet the citizenship requirements.

Grammatically, يستوفي is:

• 3rd person
• masculine
• singular

because the subject مقدم الطلب is grammatically singular masculine.

مقدم الطلب is an iḍāfa construction (a noun + noun possessive-type structure).

Literally, it means:

• مقدِّم = presenter / submitter
• الطلب = the application / request

So the whole expression means the submitter of the application, which is a standard way to say the applicant.

This kind of expression is very common in formal Arabic, especially in legal, administrative, and government language.

Because مقدم الطلب is an iḍāfa construction.

In an iḍāfa:

• the first noun usually does not take ال
• the second noun can make the whole phrase definite

So:

• مقدم الطلب = the applicant / literally submitter of the application

Even though مقدم has no ال, the whole phrase is definite because الطلب is definite.

That is why المقدم الطلب would be wrong here.

Here it is pronounced مُقَدِّم (muqaddim), not muqaddam.

That is because the meaning is submitter / presenter, which is the active participle of قدّم.

A fully vocalized version of the sentence would be:

يَسْتَوْفِي مُقَدِّمُ الطَّلَبِ شُرُوطَ الجِنْسِيَّةِ فِي القُنْصُلِيَّةِ

So:

• مُقَدِّمُ = the subject, nominative
• الطَّلَبِ = second part of the iḍāfa, genitive

This is a good example of how unvowelled Arabic script can leave pronunciation ambiguous until context makes it clear.

The singular is شرط = condition / requirement.

Its plural is شروط = conditions / requirements.

This is a broken plural, which means the word changes internally rather than just adding a regular ending. Broken plurals are extremely common in Arabic.

So:

• شرط = one requirement
• شروط = requirements

In this sentence, شروط is the direct object of يستوفي.

Because شروط الجنسية is another iḍāfa construction.

It literally means:

• شروط = requirements
• الجنسية = citizenship / nationality

Together: the requirements of citizenship or citizenship requirements.

In iḍāfa, the first noun usually does not take ال, so شروط الجنسية is exactly what we expect.

By contrast, الشروط الجنسية would usually be understood more like the national/citizenship-related requirements, where الجنسية behaves more like an adjective. That is a different structure and not the most natural phrasing for this meaning.

It can mean either, depending on context.

In everyday and legal usage, الجنسية often covers both ideas:

• nationality
• citizenship

In a sentence about formal requirements, applications, and a consulate, English often translates it best as citizenship.

So in this context, شروط الجنسية is very naturally understood as citizenship requirements.

If you fully mark the case, the sentence is:

يَسْتَوْفِي مُقَدِّمُ الطَّلَبِ شُرُوطَ الجِنْسِيَّةِ فِي القُنْصُلِيَّةِ

Here is why:

• مُقَدِّمُ → nominative, because it is the subject
• الطَّلَبِ → genitive, because it is the second term of an iḍāfa
• شُرُوطَ → accusative, because it is the direct object
• الجِنْسِيَّةِ → genitive, because it is the second term of another iḍāfa
• القُنْصُلِيَّةِ → genitive, because it comes after في

In normal unvowelled writing, these endings are usually not shown, but they are still understood grammatically.

It most naturally attaches to the whole action:

• يستوفي ... في القنصلية
• meets/fulfills ... at the consulate

So it tells you the location or administrative setting in which this requirement-checking or fulfillment is happening.

Also, with places like القنصلية, English at the consulate is usually more natural than in the consulate, even though Arabic uses في.

So في here is best understood as a normal location marker: at/in the consulate.