In the recent paper about Etruscans (Posth 2021) the researchers didn't found any solid evidence of their Iron Age Near Eastern origins

In the recent paper about Etruscans (Posth 2021) the researchers didn't found any solid evidence of their Iron Age Near Eastern origins. Based on the available data the most realistic assumption is that they descend from European Neolithic farmers who themselves are ultimately from Anatolia. One of their native Y DNA was probably the G2-L497 ( see the first map ) while the rest was R1b-P312 and few cases of J2b2a from West Balkanes.

Nevertheless at last one outlier of probably Anatolian origin was found in this dataset. It was dated at 200bc.

Another paper (Antonio 2020) discussing Latin and Etruscan DNA also had found two outliers in ancient Rome that were modeled with populations from ancient Armenia. 

And another paper has found similar case in Iron Age Sardinia.

So the question is who were those sporadic migrants from Anatolia if they can't be linked with Etruscans.

In most likelihood we see some small scale migrations that can be linked to putative Sherden ( group linked to Sea people ). There is a haplotype called J2-L70 ( https://www.yfull.com/tree/J-L70/ ) which has young  coalescence age. It is possible that this haplotype was involved in this migration. It was absent from ancient Etruscans as expected but was found in medieval Rome. More Iron Age samples from Rome and Sardinia are needed to better understand the time period and exact haplotypes of this mysterious migrants from Anatolia who were neither Greek or Etruscan.

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Below are the citations from papers.

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Contrary to previously reported findings from Bronze Age Sicily and Iron Age Sardinia (27, 28), we do not find evidence for Iranian-related ancestry in individuals from central Italy older than 2000 years (fig. S3). We were able to model C.Italy_Etruscan and C.Italy_Etruscan.Ceu as a mixture between three distal sources [Anatolia_Neolithic, Western hunter-gatherers (WHG), and Yamnaya_Samara] even when Neolithic Iranian individuals were placed in the reference set of qpAdm (table S4H). This suggests that the genetic history of Sicilians and Sardinians during the Bronze and Iron Ages was substantially different from that of populations on the Italian mainland, as confirmed by the distinctive spheres of interaction observed in the archeological record (29). The C.Italy_Etruscan_MAS001 individual represents a single exception in our dataset showing a shift in PCA space toward Near Eastern populations ~200 BCE (Fig. 4A). While f-statistics do not significantly reject ancestry continuity with the C.Italy_Etruscan cluster (table S2C), an admixture model between Neolithic- and steppe-related ancestries does not fit the genetic profile of this individual (table S4B). Instead, C.Italy_Etruscan_MAS001 can be modeled as a mixture between the C.Italy_Etruscan cluster and populations from the Caucasus, such as Bronze Age Armenians (Fig. 4B), indicating the sporadic presence of Iranian-related ancestry in Etruria at least by the second century BCE

https://www.science.org/doi/10.1126/sciadv.abi7673

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3B). Although we were able to model eight of the 11 individuals as two-way mixtures of Copper Age central Italians and a Steppe-related population (~24 to 38%) using qpAdm, this model was rejected for the other three individuals (p < 0.001; table S16). Instead, two individuals from Latin sites (R437 and R850) can be modeled as a mixture between local people and an ancient Near Eastern population (best approximated by Bronze Age Armenian or Iron Age Anatolian; tables S17 and S18).

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7093155/#__ffn_sectitle

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